Friction Stir Welding of AA6082 Thin Aluminium Alloy Reinforced with Al2O3 Nanoparticles
04 Sep 2019-Transactions of The Indian Ceramic Society (Taylor & Francis)-Vol. 78, Iss: 3, pp 137-145
TL;DR: In this paper, AA6082-T6 thin aluminium alloy plates of 2 mm thickness were friction stir welded using fine ceramic Al2O3 nanoparticles as the reinforcing materials between the adjo...
Abstract: In this present investigation, AA6082-T6 thin aluminium alloy plates of 2 mm thickness were friction stir welded using fine ceramic Al2O3 nanoparticles as the reinforcing materials between the adjo...
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TL;DR: In this article, the current status of nanoparticle reinforcement FSW process is analyzed and various properties associated with reinforced joints are presented with the mechanism of the relationship between microstructure and properties.
Abstract: Nanomaterial reinforced friction stir welding (FSW) is an emerging domain, as it delivers a promising method for enhancing joint properties by making composite joints. Composite joints can enhance surface properties like hardness, strength, corrosion resistance, wear resistance, fatigue life, electrical conductance. Over few years many publications have been reported on the application of nanoparticles reinforcement in FSW joints. The present review critically analyses the current status of nanoparticle reinforcement FSW process. Firstly need, type, behaviour, intrinsic properties of nanoparticles used in FSW are discussed. Then, the microstructural examinations of reinforced joints are analysed. Followed by, various properties associated with reinforced joints are presented with the mechanism of the relationship between microstructure and properties. Finally, various methods of deposition of nanoparticle in FSW is discussed. At last prospects of reinforced FSW are explored followed by concluding remarks.
32 citations
TL;DR: In this article, the mechanical and microstructural properties of friction stir welded similar DP600 steel were investigated and the sheets were butt welded with a single pass and three different rota...
Abstract: In the present work, mechanical and microstructural properties of friction stir welded similar DP600 steel were investigated. The sheets were butt welded with a single pass and three different rota...
10 citations
Cites methods from "Friction Stir Welding of AA6082 Thi..."
...The planimetric method was used to calculate the average grain size number [42],...
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TL;DR: In this article, the effect of adding novel biochar microparticle into the welding zone of dissimilar friction stir welding of AISI-SAE 1010 (steel) and CDA 101 (copper) alloys was investigated.
Abstract: This present work investigates the effect of adding novel biochar microparticle into the welding zone of dissimilar friction stir welding of AISI-SAE 1010 (steel)–CDA 101 (copper) alloys. The primary aim of this work was to produce efficient weld joints in AISI-SAE 1010–CDA 101 alloys using biochar as solid lubricant via friction stir welding process. The biochar particles were prepared from rice husk biomass via carbonization process. The welding was performed using tapered pin profiled tool with rotational speed of 900 rpm, traverse speed of 30 mm/min, axial load of 5 KN, dwell time of 5s, plunging depth of 0.2mm, and biochar additions of 0.5, 1, 2, and 4wt%. The highest tensile strength of 205 MPa, elongation of 44%, yield strength of 177MPa, strain value of 36, and Vickers hardness of 121 were observed for FSW joints made using 2wt% of biochar content. Large addition of biochar up to 4wt% marginally affects the properties. Similarly, the fatigue strength of 157MPa was observed for weld made using 2wt% of biochar. The microstructure of biochar-assisted weld nugget shows highly refined less thermally affected grains. The grains were in equiaxial with distortion-free. The EDAX report confirms the presence of copper, iron, and carbon on the weld nugget, which indicates fine mixing of parent metals with solid lubricant. These mechanical properties improved environmental friendly dissimilar welding method could be used in industrial applications such as automobile, aerospace, construction, defense, medical, energy where high strength with high durable weld joints are required to meet the current technology demand, and process economy.
9 citations
TL;DR: Filling Friction Stir Welding (FFSW) is an FSW completing process, in which the exit-holes at the end of friction stir welded lines are filled by a rotational semi-consumable pin this paper.
Abstract: Filling Friction Stir Welding (FFSW) is an FSW completing process, in which the exit-holes at the end of friction stir welded lines are filled by a rotational semi-consumable pin. In the present st...
9 citations
13 Jan 2021
TL;DR: In this article, aluminum hybrid composites using bamboo leaf ash (BLA) and alumina have been fabricated via stir casting and the effect of the EDM machining process parameters on the output responses such as surface roughness (Ra) and material removal rate (MRR) are evaluated using grey relational analysis.
Abstract: In this research work, aluminum hybrid composites using bamboo leaf ash (BLA) and alumina have been fabricated via stir casting. Three hybrid composites viz: A713 + 2%BLA + 2%Al2O3, A713 + 2%BLA + 4%Al2O3, A713 + 4%BLA + 2%Al2O3 are fabricated successfully and EDM machining of these three composites is performed. The EDM machining experiments of the three hybrid composites, have been designed using Taguchi L27 orthogonal array design of experiments (DOE) considering current (A), duty cycle (%), gap voltage (V) and different percentage composition of the reinforcements. The effect of the EDM machining process parameters on the output responses such as surface roughness (Ra) and material removal rate (MRR) are evaluated using grey relational analysis.
6 citations
References
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25 Feb 2015-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this article, a threaded tapered pin tool was employed to fabricate a 2-pass friction stir welded (FSWed) joint, where SiC particles had been inserted along the joint line.
Abstract: In this paper, a threaded tapered pin tool was employed to fabricate a 2-pass friction stir welded (FSWed) joint. To investigate the benefits of nano-sized SiC particles on microstructural and mechanical properties of the joint, the experiment was repeated while SiC particles had been inserted along the joint line. In another joint, a square pin tool was applied in the second pass to evaluate the effectiveness of switching pin geometry between passes on the aforementioned properties. Microstructural features including grain size, second phase particles and reinforcement distribution were examined via optical and scanning electron microscopy (SEM) techniques. In addition to satisfactory connections between SiC particles and the matrix, the most homogenous particles distribution was observed in the specimen FSWed with both pin tools. This observation was further supported by atomic force microscopy (AFM) examination. Additionally, the foregoing joint demonstrated the maximum tensile strength which was synonymous with its smallest grain size. During tensile testing, SiC-free joint and SiC-reinforced ones fractured from stir zone (SZ) and base metal, respectively. Moreover, SiC-free joint showed necking phenomenon. SEM results showed that the SiC-reinforced specimens possessed ductile fracture morphologies. On the other hand, SiC-free specimen showed a quasi-cleavage fracture mode confirming its moderate percent elongation. In the meantime, SiC-reinforced specimens exhibited superior hardness level to SiC-free specimen.
57 citations
TL;DR: In this article, the AA5052 aluminum sheets were joined by friction stir welding (FSW) technique, and the results showed that adding the SiC nano-particles led to significant grain refining of the welds.
Abstract: In the present work, the AA5052 aluminum sheets were joined by friction stir welding (FSW) technique. In order to refine the microstructure of stir zone (SZ) and to prevent the grain growth of heat-affected zone (HAZ), the SiC nano-particles were added to the weld nugget. To obtain the optimum condition for FSW, three rotational speeds (800, 1000, and 1250 rpm) and three traveling speeds (30, 50, and 80 mm/min) were applied. Microstructural evolutions were characterized using optical and scanning electron microscopes. Besides, the mechanical properties (tensile strength, hardness, and wear test) of weldment were also studied. The results showed that adding the SiC nano-particles led to the significant grain refining of the welds. However, the improper SiC powder distribution during one pass of FSW resulted in the premature fracture of workpiece. The specimens joined at the rotational speed of 1000 rpm and welding speeds of 50 and 80 mm/min exhibited the highest ultimate tensile strength.
57 citations
TL;DR: In this article, fine dispersion of hard particles of ZrO 2 and their pinning effect on the grain boundaries was investigated, and the measured amounts of SZ microhardness in the fabricated composite were compared to the results calculated by a Hall-Petch type equation already developed to obtain hardness versus grain size.
54 citations
TL;DR: In this paper, the effect of number of passes on microstructural and mechanical properties of friction stir welding of an Al-Mg alloy to austenitic stainless steel (A316L) by using nano-sized SiC reinforcement was examined.
48 citations
"Friction Stir Welding of AA6082 Thi..." refers methods in this paper
...Fallahi et al.17 friction stir welded austenitic stainless steel and AA5083-H321 plates using SiC nanoparticles at 250 rpm tool rotational speed and two traverse speeds of 20 and 16 mm/min with a constant tilt angle of 3o....
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25 Feb 2015-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: A fine-grained aluminum-matrix hybrid nanocomposite reinforced with TiO 2, MgO and Al 3 Ti nanoparticles was prepared via reactive friction stir processing (FSP) as discussed by the authors.
Abstract: A fine-grained aluminum-matrix hybrid nanocomposite reinforced with TiO 2 , MgO and Al 3 Ti nanoparticles was prepared via reactive friction stir processing (FSP) of an Al–Mg sheet with pre-placed TiO 2 particles (50 nm; 3.1 vol%). The microstructure of the hybrid nanocomposite comprises high-angle grain boundaries (~90%) with an average size of 2 µm and hard inclusions with sizes in the range of 30–50 nm. Evaluation of the hot deformation behavior of the nanocomposite by uniaxial tensile testing at different temperatures (300–450 °C) and strain rates (0.001–0.1 s −1 ) shows that the deformation apparent activation energy of the nanocomposite is 137 kJ mol −1 at ≤300 °C. The values of the activation energy for the Al–Mg alloy before and after FSP at this temperature range are about 105 and 135 kJ mol −1 , respectively. This observation highlights the role of ultrafine hard particles and the structural changes induced by FSP on the deformation process. At the higher temperatures, the deformation activation energy for the aluminum alloy without and with the reinforcing particles is 303 and 456 kJ mol −1 , respectively. Detailed microstructural analysis by electron back scattered diffraction and transmission electron microscopy suggests that dynamic recrystallization is responsible for the deformation behavior at the elevated temperatures. Meanwhile, the presence of the hard nanoparticles operates as a grain growth inhibitor improving the thermal stability of the fine-grained aluminum alloy.
45 citations