Effects of different shot peening parameters on residual stress, surface roughness and cell size

Lin, Qinjie; Liu, Huaiju; Zhu, Caichao; Chen, Difa; Zhou, Shengfeng

doi:10.1016/j.surfcoat.2020.126054

Cited by 95 publications

(39 citation statements)

References 49 publications

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“…The mathematical description of this optimization problem is as follows:

where x = ( σ surface , σ max , y max , y core ) is called an individual in GA. Each component of the individual is called a “gene”. The constraints in Equation (8b–g) are summarized from the existing experimental [ 38 , 39 , 40 , 41 ] and theoretical [ 13 , 42 ] results for RS distribution profiles produced using the shot peening process.…”

Section: Optimization Schemementioning

confidence: 99%

Residual Stress Distribution Design for Gear Surfaces Based on Genetic Algorithm Optimization

et al. 2021

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The rolling contact fatigue of gear surfaces in a heavy loader gearbox is investigated under various working conditions using the critical plane-based multiaxial Fatemi–Socie criterion. The mechanism for residual stress to increase the fatigue initiation life is that the compressive residual stress has a negative normal component on the critical plane. Based on this mechanism, the genetic algorithm is used to search the optimum residual stress distribution that can maximize the fatigue initiation life for a wide range of working conditions. The optimum residual stress distribution is more effective in increasing the fatigue initiation life when the friction coefficient is larger than its critical value, above which the fatigue initiation moves from the subsurface to the surface. Finally, the effect on the fatigue initiation life when the residual stress distribution deviates from the optimum distribution is analyzed. A sound physical explanation for this effect is provided. This yields a useful guideline to design the residual stress distribution.

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“…The mathematical description of this optimization problem is as follows:

Section: Optimization Schemementioning

confidence: 99%

Residual Stress Distribution Design for Gear Surfaces Based on Genetic Algorithm Optimization

et al. 2021

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“…Although both procedures aim to prevent the formation and propagation of cracks during cyclic loading, the mode by which they tackle the problem is different: electropolishing eliminates surface irregularities and stress concentrators by polishing and wear 11 , 26 , while SP induces residual compressive stresses under a plastic deformation layer, which also aims to eliminate the existing cracks and their propagation (Fig. 2 b), as well as the surface defects that can act as stress concentrators under cyclic loads 16 , 51 .…”

Section: Discussionmentioning

confidence: 99%

Shot peening increases resistance to cyclic fatigue fracture of endodontic files

Nino-Barrera

Sanchez-Aleman

Acosta-Humánez

et al. 2021

Sci Rep

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The objective of this study was to assess the resistance to fatigue fracture of conventional nickel–titanium files after undergoing shot peening. Forty NITIFLEX endodontic files, number 30, were divided into two groups; one was submitted to shot peening treatment and the other was not. All instruments were tested for fatigue fracture in simulated canals with a TRI-AUTO ZX endodontic motor. One file of each group was subjected to a residual stress analysis by XRD. Finally, the fractured surface was observed and elemental analysis performed by means of SEM and EDX. Roughness analysis was made by focal variation microscope. The shot peening group showed greater resistance to fatigue fracture; there was no difference in the length of the fractured fragments. XRD results showed the presence of residual compression stresses in the file submitted to shot peening, a decrease in the interplanar spacing, and an increase in the full-width-at-half-maximum and the microstrains. SEM and EDX showed a ductile fracture with zones of fatigue and an equiatomic ratio between the nickel and titanium. Surface roughness increased after the file was subjected to the shot peening procedure. In conclusion, shot peening increases the resistance to fatigue fracture due to the presence of residual compression stresses in files manufactured from a conventional nickel–titanium alloy.

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“…When T ! 100%, with a decrease of D c , R t simulation value decreases gradually, this is because the overlapping rate of dimples gradually increases, and equation (3) shows that R t is proportional to D c . Therefore, R t and R sm can be decreased by decreasing D c , to improve the surface topography of the target material.…”

Section: Influence Of Process Parameters On Surface Topographymentioning

confidence: 99%

“…This can induce elasticplastic strain in metal material, and induce a compressive residual stress field (RSF) in the material surface. Compared with the classical shot peening, [1][2][3][4] the impact positions of the shots are disordered, random, and chaotic for the classical shot peening, while the impact positions of the shots are regular and controllable by adjusting peening parameters for abrasive water jet sequential peening (AWJSP). In AWJP process, shots pass through a nozzle with dense carrier water to reach a certain velocity, and then the shots impact on the target material.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of surface topography and residual stress after abrasive water jet sequential peening

Cui

Zhao

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part L:

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In this paper, the theoretical models of the surface topography and residual stress (RS) were proposed, and the abrasive water jet sequential peening (AWJSP) finite element models were established by using ABAQUS. Then, the formation mechanism of the surface topography in multiple passes AWJSP process and the coupling mechanism of RS in a single and multiple passes AWJSP process were analyzed. After that, the influence of the number of shots (i.e. N), the distance between the center of adjacent shots Dc, shot velocity v, and shot radius R on the surface topography and residual stress field (RSF) of the target were investigated. Results show that successive dimples were formed by single-pass AWJSP, the RSF formed by the impact of each shot will influence the previous RSF, and that will be coupled with it. In multiple passes AWJSP process, decreasing Dc can decrease the surface roughness, the surface smoothness of the target material will gradually become better, and the RSF will also be uniform. Under full coverage condition, the surface roughness Rt and mean width of the profile Rsm will gradually decrease with the decrease of Dc, while the change of Dc has little influence on the RSF. Increasing the v can increase Rt and Rsm, and it is beneficial to induce a large and deep compressive RS layer. Increasing the R can decrease Rt, Rsm remains unchanged, and it is beneficial to induce a deep compressive RS layer.

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Effects of different shot peening parameters on residual stress, surface roughness and cell size

Cited by 95 publications

References 49 publications

Residual Stress Distribution Design for Gear Surfaces Based on Genetic Algorithm Optimization

Residual Stress Distribution Design for Gear Surfaces Based on Genetic Algorithm Optimization

Shot peening increases resistance to cyclic fatigue fracture of endodontic files

Numerical simulation of surface topography and residual stress after abrasive water jet sequential peening

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