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Showing papers on "Peening published in 2006"



Journal ArticleDOI
TL;DR: In this paper, a numerical simulation of the shot peening process using finite element method is presented, where the majority of the controlling parameters of the process have been taken into account.
Abstract: This paper presents a numerical simulation of the shot peening process using finite element method. The majority of the controlling parameters of the process have been taken into account. The shot peening loading has been characterised by using energy equivalence between the dynamic impact and a static indentation of a peening shot in the treated surface. The behaviour of the subjected material is supposed to be elastic plastic with damage. An integrated law of the damage proposed by Lemaitre and Chaboche has been used. The proposed model leads to obtain the residual stress, the plastic deformation profiles and the surface damage. An application on a shot peened Ni-based super alloy Waspaloy has been carried out. The comparison of the residual stresses, obtained by X-ray diffraction method and by finite element calculation, shows a good correlation. The in-depth profile of the plastic deformations and the superficial damage values are in good agreement with the experimental observations.

153 citations


Book
06 Feb 2006
TL;DR: In this article, the authors present a procedure for Mechanical Surface Treatments, which consists of three steps: shot peening, warm peening and deep rolling, and finally, laser peening.
Abstract: 1 Introduction. 2 Procedures of Mechanical Surface Treatments. 2.1 Shot Peening. 2.1.1 Definition and Delimitation of Procedure. 2.1.2 Application Examples. 2.1.3 Devices, Tools and Important Parameters. 2.2 Stress Peening. 2.2.1 Definition and Delimitation of Procedure. 2.2.2 Application Examples. 2.2.3 Devices, Tools and Important Parameters. 2.3 Warm Peening. 2.3.1 Definition and Delimitation of Procedure. 2.3.2 Application Examples. 2.3.3 Devices, Tools and Important Parameters. 2.4 Stress Peening at Elevated Temperature. 2.5 Deep Rolling. 2.5.1 Definition and Delimitation of Procedure. 2.5.2 Application Examples. 2.5.3 Devices, Tools and Important Parameters. 2.6 Laser Peening. 2.6.1 Definition and Delimitation of Procedure. 2.6.2 Application Examples. 2.6.3 Devices, Tools and Important Parameters. 3 Surface Layer States after Mechanical Surface Treatments. 3.1 Shot Peening. 3.1.1 Process Models. 3.1.2 Changes in the Surface State. 3.2 Stress Peening. 3.2.1 Process Models. 3.2.2 Changes in the Surface State. 3.3 Warm Peening. 3.3.1 Process Models. 3.3.2 Changes in the Surface State. 3.4 Stress Peening at elevated Temperature. 3.5 Deep Rolling. 3.5.1 Process Models. 3.5.2 Changes in the Surface State. 3.6 Laser Peening. 3.6.1 Process Models. 3.6.2 Changes in the Surface State. 4 Changes of Surface States due to Thermal Loading. 4.1 Process Models. 4.1.1 Elementary Processes. 4.1.2 Quantitative Description of Processes. 4.2 Experimental Results and their Descriptions. 4.2.1 Influences on Shape and Topography. 4.2.2 Influences on Residual Stress State. 4.2.3 Influences on Workhardening State. 4.2.4 Influences on Microstructure. 5 Changes of Surface Layer States due to Quasi-static Loading. 5.1 Process Models. 5.1.1 Elementary Processes. 5.1.2 Quantitative Description of Processes. 5.2 Experimental Results and their Descriptions. 5.2.1 Influences on Shape and Deformation Behavior. 5.2.2 Influences on Residual Stress State. 5.2.3 Influences on Workhardening State. 5.2.4 Influences on Microstructure. 6 Changes of Surface States during Cyclic Loading. 6.1 Process Models. 6.1.1 Elementary Processes. 6.1.2 Quantitative Description of Processes. 6.2 Experimental Results and their Descriptions. 6.2.1 Influences on Residual Stress State. 6.2.2 Influences on Worhardening State. 6.2.3 Influences on Microstructure. 6.3 Effects of Surface Layer Stability on Behavior during Cyclic Loading. 6.3.1 Basic Results. 6.3.2 Effects on Cyclic Deformation Behavior. 6.3.3 Effects on Crack Initiation Behavior. 6.3.4 Effects on Crack Propagation Behavior. 6.3.5 Effects on Fatigue Behavior. 7 Summary. Acknowledgments. Index.

135 citations


Journal ArticleDOI
TL;DR: In this article, shot peening is assessed as a potential method for improving the fatigue strength of titanium aluminide alloys based on γ(TiAl) and metallographic characterization was performed with regard to surface roughness, microhardness, residual stress profiles, and structural changes occurring in the subsurface region.

118 citations


Journal ArticleDOI
TL;DR: Laser peening without coating (LPwC) is an innovative surface enhancement technology, which imparts compressive residual stress without any surface preparations as discussed by the authors, which significantly prolonged the fatigue lives despite the increase in surface roughness.
Abstract: Laser peening without coating (LPwC) is an innovative surface enhancement technology, which imparts compressive residual stress without any surface preparations. Materials were peened in aqueous environment with laser pulses of about 100 mJ from a Q-switched and frequency-doubled Nd:YAG laser. Surface roughness of the materials somewhat increased due to ablative interaction. Compressive residual stress nearly equal to the yield strength of the materials appeared at the surface after LPwC in spite of the possible heat effect by direct laser irradiation to the materials. The depth of the compression reaches 1 mm or more from the peened surface. High-cycle fatigue properties were evaluated through rotating-bending or push-pull type testing for an austenitic stainless steel (SUS316L), a titanium alloy (Ti-6Al-4V) and a cast aluminum alloy (AC4CH). LPwC significantly prolonged the fatigue lives despite the increase in surface roughness. Accelerating stress corrosion cracking (SCC) tests showed that LPwC completely eliminated SCC susceptibility of sensitized austenitic stainless steels, nickel-based alloys and their weld metals. LPwC has been utilized to prevent SCC in Japanese nuclear power reactors since 1999.

110 citations


Journal ArticleDOI
Kan Ding1, Lin Ye1
TL;DR: In this article, the authors focus on applying finite element analyses to predict the development, magnitude and distribution of residual stresses induced by multiple LSP impacts on a metal alloy, 35CD4 30 HRC steel.

106 citations


Journal ArticleDOI
TL;DR: In this paper, the effect of an absorbent overlay on the residual stress field using this LSP setup and this energy level was evaluated and it was observed that the overlay makes the compressive residual stress profile move to the surface.

89 citations


Journal ArticleDOI
TL;DR: In this paper, a rotating pin ultrasonic peening (RPUP) technique is introduced providing near surface severe plastic deformation via repetitive impactions with simultaneous compressive and shear modes of high rate strain.
Abstract: A new rotating pin ultrasonic peening (RPUP) technique is introduced providing near surface severe plastic deformation via repetitive impactions with simultaneous compressive and shear modes of high rate strain. The basic concept of the RPUP is described with special attention to the possible nanocrystallization mechanism. The superior fatigue behavior of the commercially pure titanium samples observed after RPUP is shown to be attributable to a number of beneficial features such as (i) residual compressive stresses, (ii) surface nano-structure, (iii) enhanced surface hardness and (iv) reduced surface roughness. X-ray diffraction (XRD) is used to analyze the grain/cell size, the lattice microstrain and residual stresses in the top surface layer. The surface nanostructure observed in α-titanium at a depth of about 30 μm and its gradual increase in size down to depth of about 100 μm are characterized by means of transmission electron microscopy (TEM). The peak-to-valley magnitude dependence on the correlation of the compressive and shear strain modes during single impaction with RPUP has been shown using a two-dimensional finite element analysis by modeling a rigid high-velocity pin impacting an elasto-plastic surface.

85 citations


Journal ArticleDOI
TL;DR: In this paper, the effects of fatigue and fretting fatigue on the distribution of residual stresses in shot and laser shock peened Ti-6Al-4V samples have been investigated.
Abstract: The effects of fatigue and fretting fatigue on the distribution of residual stresses in shot and laser shock peened Ti–6Al–4V samples have been investigated. Residual elastic strains have been determined using high-energy synchrotron X-ray diffraction. Laser shock peening introduces a considerable compressive residual stress, the compressive zone extending 1.5 mm below the surface. The effects of fatigue loading have been investigated using a notched three-point bend geometry. The residual stress field was found to be largely insensitive to fatigue cycling, at least for the applied stress range studied. For fretting fatigue, while the residual stresses at depth were little affected, within 0.5 mm of the surface significant stress relaxation was observed; the extent of relaxation being greatest in the direction parallel to the fretting direction. The states of residual stress have been quantified using the concept of eigenstrain, which quantifies the retained plastic misfit resulting from peening. Finite element modeling has been used to determine the eigenstrain profiles causing the measured elastic strain profiles, and the changes to these eigenstrain profiles due to fretting. Our results suggest laser shock peening confers much greater fretting fatigue resistance than traditional shot peening alone due to the much deeper compressive zone.

84 citations


Journal ArticleDOI
TL;DR: In this paper, a method for extending the capability of the contour method to allow for the measurement of spatially varying multi-axial residual stresses in prismatic, continuously processed bodies is described.
Abstract: This paper describes a method for extending the capability of the contour method to allow for the measurement of spatially varying multi-axial residual stresses in prismatic, continuously processed bodies Currently, the contour method is used to determine a 2D map of the residual stress normal to a plane This work uses an approach similar to the contour method to quantify multiple components of eigenstrain in continuously processed bodies, which are used to calculate residual stress The result of the measurement is an estimate of the full residual stress tensor at every point in the body The approach is first outlined for a 2D body and the accuracy of the methodology is demonstrated for a representative case using a numerical experiment Next, an extension to the 3D case is given and the accuracy is demonstrated for representative cases using numerical experiments Finally, measurements are performed on a thin sheet of Ti-6Al-4V with a band of laser peening down the center (assumed to be 2D) and a thick laser peened plate of 316L stainless steel to show that the approach is valid under real experimental conditions

81 citations


Journal ArticleDOI
TL;DR: In this paper, the influence of AWJ peening on the compressive residual stress, surface texture and fatigue strength of a stainless steel (AISI 304) and titanium (Ti6Al4V) alloy were studied.
Abstract: Abrasive waterjet (AWJ) peening has been proposed as a viable method of surface treatment for metal orthopedic devices. In this study the influence of AWJ peening on the compressive residual stress, surface texture and fatigue strength of a stainless steel (AISI 304) and titanium (Ti6Al4V) alloy were studied. A design of experiments (DOE) and an analysis of variance (ANOVA) were used to identify the primary parameters contributing to the surface texture and magnitude of surface residual stress. The influence of AWJ peening on the fatigue strength of the metals was evaluated under fully reversed cyclic loading. It was found that AWJ peening results in compressive residual stress and is primarily influenced by the abrasive size and treatment pressure. The residual stress of the AISI 304 ranged from 165 to over 460 MPa. Using the optimum treatment parameters for maximizing the residual stress, the endurance strength of Ti6Al4V was increased by 25% to 845 MPa. According to results of this study AWJ peening is...

Journal ArticleDOI
TL;DR: In this paper, the effects of nitriding, nitrocarburizing, and shot peening on fatigue behavior of AISI D3 cold work tool steel were investigated, and the results showed that shot peens increased the fatigue life of specimens by about 14%, while double stage nitriders decreased it by about 8%.

Journal ArticleDOI
TL;DR: In this article, an equivalent loading unit that can produce a plastic layer was used to model the macroscopic forming effects of shot peening, where a specific plastic coverage exists in which the individual peen impacts can be regarded as acting independently, their cumulative effects can be distributed in the plastic layer as the result of a static load.

Journal ArticleDOI
TL;DR: In this paper, the axial fatigue strength of EN45A spring steel specimen is evaluated experimentally as a function of shot peening in the conditions used for full-scale leaf springs testing in industries.

Journal ArticleDOI
TL;DR: In this article, the residual elastic strain distribution was modelled using a distribution of laser shock induced eigenstrains near the surface, and the most likely eigen-strain profile was deduced using a variational matching procedure.
Abstract: High-energy synchrotron X-ray diffraction measurements of residual elastic strain were carried out in a thin slice parted off from a plate of titanium alloy that had been subjected to laser shock peening. The residual elastic strain varies with the distance from the laser shock peened surface, with high near-surface compressive strain changing to tensile strain in the middle of the sample, and then becoming compressive again on the opposite face. The measured residual elastic strain distribution was modelled using a distribution of laser shock induced eigenstrains near the surface, and the most likely eigenstrain profile was deduced using a variational matching procedure. The mathematical framework for this approach is presented and discussed, and the results of matching the predicted residual elastic strain distribution to the measurement are shown.

Book ChapterDOI
07 Feb 2006
TL;DR: In this paper, a more detailed approch by simulating several single impacts on a 3-dimensional surface is chosen to model the shot peening process, which can be seen as a multiple and progressively repeated elastic-plastic interaction between the surface and the shots.
Abstract: Shot peening, known for its potential to improve fatigue strength of metallic parts, can be seen as a multiple and progressively repeated elastic-plastic interaction between the surface and the shots. With each impact the target undergoes local plastic deformation while the shot is moving into the material. After the contact between the target and the shot has ceased, compressive residual stresses remain at the surface and small tensile residual stresses in the inside. Developing a model to analyze the process of shot peening is usefirl for several reasons; to be able to predict the material state after peening without having to conduct costly experiments and to be able to optimize peening processes. In contrast to prior studies found in the literature [I-41, a more detailed approch by simulating several single impacts on a 3-dimensional surface is chosen to model the shot peening process.

Journal ArticleDOI
TL;DR: Water cavitation peening (WCP) through the cavitation impact induced by the water jet process has been applied to introduce the compressive residual stress in the surface layer of metallic materials as mentioned in this paper.
Abstract: Water cavitation peening (WCP), through the cavitation impact induced by the water jet process, has been applied to introduce the compressive residual stress in the surface layer of metallic materials. In the present study, five incidence angles (0°, 30°, 45°, 60°, and 90°) were adopted. The impact pressure induced by the bubble collapse was measured by a pressure measurement technique with pressure sensitive film. The residual stresses of a spring steel SAE 1070 plate specimen treated by WCP were determined through X-ray stress analysis. The results indicated that the impact pressure and residual stress obtained at various incidence angles were almost equal to each other in the effective process area. It implied that the process capability of WCP was almost isotropic. Moreover, such potential of WCP was also applied to a carburizing-quenched helical gear, and the high and uniform compressive residual stress was simultaneously introduced in the surface and bottom of gear tooth. It indicated that, compared with the conventional shot peening and laser shock peening, WCP was more effective to the metallic components with the complicated shape.

Journal ArticleDOI
TL;DR: In this article, it is demonstrated that adding the three contributions mentioned above yields a good description of the observed dependence of stress on thickness in CrN coatings, i.e., the tensile part due to grain boundaries is thickness dependent, and the other two contributions are not thickness dependent.
Abstract: Stress in hard films is the net sum of tensile stress generated at the grain boundaries, compressive stress due to ion peening, and thermal stress due to the difference in thermal expansion of the coating and substrate. The tensile part due to grain boundaries is thickness dependent. The other two contributions are not thickness dependent. Summation of the three components leads to a stress gradient in the coating. In the present paper it is demonstrated that adding the three contributions mentioned above yields a good description of the observed dependence of stress on thickness in CrN coatings.

Journal ArticleDOI
TL;DR: In this paper, the actual potential of the shot peening process for alumina and in detail for silicon nitride ceramics is analyzed. And the influence of shot-peening parameters on the residual stress state, dislocation density, topography, static and cyclic and rolling near-surface strength is determined.
Abstract: Shot peening is a common finishing procedure to improve the static and cyclic strength of metal components. Recent investigations showed that, under specific shot peening conditions, also in brittle ceramics high compressive stresses up to more than 1 GPa can be introduced near the surface which increase the near-surface strength. The presentation compiles the actual potential of the shot peening process for alumina and in detail for silicon nitride ceramics. The influence of shot peening parameters on the residual stress state, dislocation density, topography, static and cyclic and rolling near-surface strength is determined.

Journal ArticleDOI
TL;DR: In this article, an explicit finite element analysis is carried out to study the effect of molten particle impingement using deposition of an HVOF sprayed copper coating on a copper substrate as an example system.
Abstract: The application of thick high-velocity oxyfuel (HVOF) coatings on metallic parts has been widely accepted as a solution to improve their wear properties. The adherence of these coatings to the substrate is strongly influenced by the residual stresses generated during the coating deposition process. In an HVOF spraying process, due to the relatively low processing temperature, significant peening stresses are generated during impact of molten and semimolten particles on the substrate. At present, finite-element (FE) models of residual stress generation for the HVOF process are not available due to the increased complexities in modeling the stresses generated due to the particle impact. In this work, an explicit FE analysis is carried out to study the effect of molten particle impingement using deposition of an HVOF sprayed copper coating on a copper substrate as an example system. The results from the analysis are subsequently used in a thermomechanical FE model to allow the development of the residual stresses in these coatings to be modeled.

Journal ArticleDOI
TL;DR: In this paper, the deburring and surface conditioning by micro peening and ultrasonic wet peening of structures made by micro milling of quenched and tempered tool steel are investigated.
Abstract: Deburring and smooth finishing processes for milled workpieces are well known in macro mould and die manufacturing. These processes are not directly transferable to micro parts and must be modified for this purpose. Therefore, deburring and surface conditioning by micro peening and ultrasonic wet peening of structures made by micro milling of quenched and tempered tool steel are investigated. The results are presented in this paper.

Journal ArticleDOI
TL;DR: In this paper, a self-closed numerical model that can simulate the laser pulse transmission through the breakdown plasma generated in water during LSP has rarely been reported in literature, and good agreement with experimental data have been obtained under a variety of LSP conditions.
Abstract: Laser shock peening (LSP) under a water confinement regime can produce plasma pressures on the target surface four times higher and 2–3 times longer than that under direct regime configurations. However, when the laser power density is above some threshold, a breakdown plasma occurs in water, which screens a significant amount of the incident laser pulse and therefore limits the magnitude and duration of the pressure induced on the target surface. A self-closed numerical model that can simulate the laser pulse transmission through the breakdown plasma generated in water during LSP has rarely been reported in literature. In this work, the breakdown plasma is simulated by solving an electron rate equation coupled with a Maxwell’s wave equation. The peak irradiance and duration of the laser pulse transmitted through the breakdown plasma predicted from the model can be correlated reasonably well with experimental data for 25 ns-1064 nm laser pulses. This model is then coupled with a previously developed thermal model for LSP to calculate the pressure pulse induced on the target surface. The trend of the pressure saturation and the pressure pulse duration decrease beyond some threshold laser irradiance is captured successfully by the model, and good agreements with experimental data have been obtained under a variety of LSP conditions.

Journal ArticleDOI
TL;DR: In this paper, the enhancement effect of shot peening on the kinetics of aluminide diffusion coating growth on alloy steels at temperatures below 675°C was investigated.

Book ChapterDOI
07 Feb 2006
TL;DR: In this paper, a systematic overview of up-to-date knowledge about the changes in the surface state due to shot peening is given by discussing characteristic examples concerning changes of the topography, residual stress state, workhardening state and microstructure of components.
Abstract: Production processes, especially mechanical surface treatments like shot peening, lead to changes in the materials state close to the surface, which severely affect the success of the treatment, especially the resulting fatigue properties. Formerly these effects on fatigue life were controversely discussed as effects of mechanical workhardening, which first were postulated to be dominating by Foppl and his group [1,2], and effects of compressive residual stresses, which first were assumed to increase the fatigue properties by Thum and his group [3,4]. Additionally, effects of topography on fatigue properties were studied by Houdremont and Mailander [5] and Siebel and Gaier 161. Today it is well known that most of the changes of surface characteristics induced by shot peening which are listed in Fig. 1 and the stability of these changes may affect the fatigue properties of components and that these effects can be described in the so called concept of local fatigue properties [7,8,9]. 'Therefore the influence of process parameters of the shot peening treatments listed in Fig. 2 on the surface characteristics has to be well known. Besides the parameters concerning the peening device or the shot, the parameters concerning the workpiece are of high interest. Especially the workpiece temperature and the prestress are altered in modifications of the peening process named warm peening and stress peening which will be discussed separately. Tn some cases additional annealing treatments are used to achieve further improvements of the material state close to the surface. In the presen! paper a systematic overview of up to date knowledge about the changes in the surface state due to shot peening is given by discussing characteristic examples concerning changes of the topography, residual stress state, workhardening state and microstructure of components due to shot peening. A special focus will be drawn to the previously mentioned modifications of the conventional shot peening process like stress peening, warm peening and peening plus subsequent annealing, which show improvements in the surface properties or at least improvements of the stability of the induced surface state.

Journal ArticleDOI
Dayong Cai1, Pulin Nie1, Jiaping Shan1, W.C. Liu1, Mei Yao1, Yukui Gao 
TL;DR: In this paper, the residual compressive stress field induced by shot peening and its relaxation behavior during aging were determined using the Zener-Wert-Avrami function.
Abstract: Mechanical surface treatment by shot peening followed by aging at 700 and 740 °C was performed on Inconel 718. A previously proposed XRD method (Ref 10) for the quantitative phase analysis of Inconel 718 allowed for the determination of the precipitation kinetics of the γ″ phase in the shot-peened layer and the matrix, respectively. The residual compressive stress field induced by shot peening and its relaxation behavior during aging were also determined. The relaxation process can be described by the Zener-Wert-Avrami function. The precipitation rate in the γ″ phase in the shot-peened layer is greatly accelerated, which causes differences in the γ″ phase amounts between the skin and the core during aging, especially during the initial stage. The high precipitation rate of the γ″ phase in the shot-peened layer can be interpreted by the nonequilibrium segregation of niobium.

Journal ArticleDOI
TL;DR: In this article, a new peening process for introducing compressive residual stresses with less erosion and good surface finish using a high pressure oil jet was developed, where AA 6063 was peened with an oil pressure of 50 MPa at different stand-off-distances.
Abstract: A new peening process for introducing compressive residual stresses with less erosion and good surface finish using a high pressure oil jet was developed. Aluminium alloy, AA 6063 was peened with an oil pressure of 50 MPa at different stand-off-distances. Residual stresses measured using X-ray diffraction indicated the induction of about 50 MPa (compressive) residual stresses on the surface. The depth of compressive residual stress developed was about 250 μm. The surface roughness of the oil jet peened surface depends on the stand-off-distance. Significant work hardening was observed at low stand-off-distances. The temperature rise during the process was marginal and doesn't contribute to stress relaxation. Erosion during the process was also reported based on the mass loss rate measured.

Journal ArticleDOI
TL;DR: In this paper, a modified LSP process is proposed to generate strong dislocation activity in silicon crystal by modifying the laser shock peening process and it is found that dislocation density, dislocation multiplication rate, and dislocation microstructure strongly depend on LSP processing conditions.

Journal ArticleDOI
TL;DR: In this article, the authors investigated the different mechanisms through which cold work could influence the eddy current conductivity in surface-treated nickel-base superalloys and found that neither the magnetic susceptibility nor the piezoresistivity of the material is affected significantly by cold work up to 50% plastic strain level, but the electrical conductivity does substantially increase due to microstructural changes.
Abstract: Shot-peened nickel-base superalloys exhibit 1–2% increase in apparent eddy current conductivity (AECC), which can be exploited for nondestructive residual stress assessment. Experimental evidence indicates that the excess AECC is due in part to elastic strains, i.e., residual stress, and in part to plastic strains, i.e., cold work. The very fact that the conductivity increases rather than decreases was originally thought to indicate that there was no significant cold work contribution to the observed AECC increase. This assumption was also supported by X-ray diffraction (XRD) results on fully relaxed specimens showing that the cold work induced widening of the diffraction beam only partially vanishes when both the residual stress and the AECC completely disappear due to thermal relaxation. However, we show in this paper that assuming that the conductivity change is entirely due to residual stress via the piezoresistivity of the material could result in an unacceptable overestimation of the magnitude of the compressive residual stress. Therefore, we investigated the different mechanisms through which cold work could influence the AECC in surface-treated nickel-base superalloys. It was found that neither the magnetic susceptibility nor the piezoresistivity of the material is affected significantly by cold work up to 50% plastic strain level, but the electrical conductivity does substantially increase due to microstructural changes. Based on these observations, we suggest that in future research the complex variations caused by cold work should be modeled by at least two main types of cold work parameters rather than by a single one in order to properly account for the otherwise contradictory effects of plastic deformation on eddy current conductivity and XRD measurements.

Journal ArticleDOI
TL;DR: In this paper, the authors present the findings of an investigative study into the possibility of inducing compressive residual stresses on machined surfaces by the use of ultrasonic cavitation, with the aim of reducing or eliminating burr formation.
Abstract: Advances in machining technology, particularly in the field of micro-machining, have led to the design and creation of miniature components suitable for use in the precision engineering industry. However, the need to contain ubiquitous burrs still exists and has to be addressed. Previous studies on deburring have mostly focused on the parametric investigations of orientation, temperature, type of liquid media and abrasives, frequency, deburring time and power. It is hypothesized that by inducing compressive residual stresses on a pre-machined workpiece surface, the resulting burrs caused by machining can be minimized or even eliminated. The paper presents the findings of an investigative study into the possibility of inducing compressive residual stresses on machined surfaces by the use of ultrasonic cavitation, with the aim of reducing or eliminating burr formation. The paper also briefly reviews the development of ultrasonic cavitation and covers published work on deburring by ultrasonic cavitation. Experimental results are presented on the performance of ultrasonic cavitation peening on the residual stress in Stavax stainless steels and on micro-burr formation.

Journal ArticleDOI
TL;DR: In this article, the effect of oil jet pressure on the surface integrity and texture of metals are discussed, and the surface morphology, mass loss rate, indentation, and erosion are reported.