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Peening

About: Peening is a research topic. Over the lifetime, 5538 publications have been published within this topic receiving 73073 citations.


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TL;DR: In this article, an analytical algorithm cooperating with finite element method was proposed to simulate the strain distribution and surface topography of the peened surface during USSP, and the simulation results show a reasonable agreement with the experimental results.
Abstract: Surface nanocrystallization of AISI-1018 steel was successfully realized by ultrasonic shot peening (USSP). The fabricated nanocrystalline surface layer was observed and characterized by means of scanning electron microscope and transmission electron microscope. Experimental evidence indicates that after USSP, the initial coarse-grained structure (~20 lm) at the top surface layer was refined into ultrafine grains with random crystallographic orientation and the elongated grains were observed at the sub-surface layer. Nanograins (~100 nm) and nanocrystalline surface layer with the thickness of 1 lm were fabricated after USSP treatment of 20 minutes. By increasing the USSP treatment duration to 60 minutes, nanograins in the size of 20 nm and nanocrystalline surface layer with the thickness of not less than 10 lm were generated. To predict the generation of nanostructured surface layer by plastic strain, an analytical algorithm cooperating with finite element method was proposed to simulate the strain distribution and surface topography of the peened surface during USSP. The proposed algorithm was verified and the simulation results show a reasonable agreement with the experimental results.

28 citations

Journal ArticleDOI
TL;DR: In this paper, the effect of shot peening on the reverse and pulsating bending fatigue behavior of Al 7075 T651 was investigated by means of X-ray diffraction (XRD) measurements.

28 citations

Journal ArticleDOI
TL;DR: In this article, the authors investigated the effect of shot peening with two groups of parameters representing limits for practical use in service on growth of physically short fatigue cracks in a 2.4mm thick sheet of an aircraft V-95 Al-alloy (a type of a 7075 alloy), clad with a 7072 Al Alloy (Al-Zn1) was investigated.
Abstract: An effect of shot peening with two groups of parameters representing limits for practical use in service on growth of physically short fatigue cracks in a 2.4 mm thick sheet of an aircraft V-95 Al-alloy (a type of a 7075 alloy), clad with a 7072 Al-alloy (Al–Zn1) was investigated. The first part of the work deals with measurement techniques of short cracks, with an adaptation and verification of direct current potential drop (DCPD) method for detection of short crack initiation and early stages of growth. The possibilities of the method in terms of sensitivity and resolution as well as the limits are discussed. Using the improved experimental methodology, physically short fatigue cracks of the length from 0.2 mm to more than 3 mm, most of them between 0.8 and 1.5 mm, were prepared under high cycle fatigue repeated tensile loading of the constant nominal stress range 160 MPa, load asymmetry R = 0. Specimens with existing short fatigue cracks together with some specimens with no cracks were then shot peened using two different groups of parameters. Microhardness measurement and informative measurement of residual stresses near the peened edges were carried out. Development of crack growth after shot peening were measured and compared with crack growth in specimens without shot peening. Retardation of crack growth was significant particularly for cracks shorter than 2 mm. For the specific stress range, evaluated results enabled to estimate threshold length of defects, which will be reliably arrested after the application of the shot peening.

28 citations

Journal ArticleDOI
TL;DR: In this article, warm laser shock peening (WLSP) technology was successfully applied as a post weld treatment in present work and significant 42.3% increase in high cycle vibration fatigue limit was achieved.

28 citations

Journal ArticleDOI
15 Aug 2016-Wear
TL;DR: In this article, the effect of the inner and outer jet velocities in cavitation jet peening in a co-flow configuration on cavitation intensity and peening performance was investigated, characterized by accelerated erosion on Al 1100-O and Al 7075-T6.

28 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023256
2022500
2021282
2020303
2019340
2018305