Effect of High-Energy Shot Peening on Surface Nanocrystallization and Integrity of AISI 4140 Steel: A Numerical and Experimental Investigation

Wang, Zhou; Wang, Xiaoli; Huang, Haiming; Gan, Jin; Yang, Ying; He, Jiaxi; Shi, Ming Hao

doi:10.1007/s11665-021-05821-1

Cited by 6 publications

(4 citation statements)

References 40 publications

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“…The results show that the effect of shot peening on improving fatigue properties does not vary simply monotonically with shot peening intensity and coverage, and that surface integrity and fatigue resistance are relatively high within a certain range of shot peening parameters. When choosing shot peening parameters, it is inappropriate to blindly pursue high strength or shot peening coverage while ignoring the surface integrity of the metal material [26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Effect of Shot Peening and Re-Shot Peening on the Residual Stress Distribution and Fatigue Life of 20CrMnTi

Qian

Wang²,

Liu

et al. 2023

Coatings

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As a surface peening technique, shot peening introduces residual compressive stresses to the surface of the part, which effectively increases the fatigue life of the structure and material. However, when structures are subjected to alternating loads, this can lead to stress relaxation on the material surface, weakening the effectiveness of the shot peening process. In addition, reasonable shot peening parameters are essential. In this paper, the effects of shot peening pressure and shot coverage on the fatigue life of materials during shot peening were investigated, followed by fatigue tests on 20CrMnTi specimens using a high-frequency fatigue testing machine to study the effects of shot peening and re-shot peening on the fatigue life of shot-peened materials after different load cycles. The results show that a reasonable shot peening pressure and coverage rate can significantly improve the fatigue life of the material, while a shot peening pressure higher than 0.4 MPa will reduce the fatigue life of the material 20CrMnTi. Coverage rates of 100% and 200% can both improve the fatigue life of the material, while a 200% coverage rate has a better strengthening effect. Re-shot peening removes the residual compressive stress relaxation on the surface of the material caused by cyclic loading and improves the fatigue life of the material. The maximum value of the residual compressive stress on the surface of the test material after shot peening is 443 MPa, and after a certain number of fatigue loads, the residual compressive stress on the surface is reduced to 203 MPa, which is subjected to secondary shot peening, and the residual compressive stress is restored to 415 MPa, and the fatigue life is significantly increased. When the second shot peening time is taken as 25% of the fatigue life of the initial shot blasting of the material, the shot peening effect is better.

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Section: Introductionmentioning

confidence: 99%

Experimental Study on the Effect of Shot Peening and Re-Shot Peening on the Residual Stress Distribution and Fatigue Life of 20CrMnTi

Qian

Wang²,

Liu

et al. 2023

Coatings

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“…Traditional surface-strengthening technologies, such as rolling, shot peening, and other mechanical hardening methods, are difficult to utilize in parts with poor rigidity, such as thin-walled pipes, or to improve the surface roughness of pipe fittings, which affects the pipe's sealing performance [3,4].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Residual Stress Field and Improvement of Fatigue Properties of Thin-Walled Pipes by Filling Laser Shock Peening

Wang

Zhao

et al. 2022

Metals

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In the present work, a filling and laser shock peening (LSP) method is put forward and applied to a thin-walled pipe. Specimens were experimentally and numerically investigated to identify the residual stress field and fatigue properties of a pipe with and without LSP treatment. The numerical simulation indicated that the residual compressive stress first increased and subsequently dropped as the laser power density increased, and the extent of influence of the stretching wave, reflected from the lower surface on the unloaded area, increased with the spot diameter, causing surface tensile stress in the unloaded area. By filling the pipe with the guided-wave material, the residual stress field of the pipe that was treated with LSP was optimized, and the influence of the stress wave reflection on the residual stress field was effectively decreased. The surface residual stress of the filled guided wave material was −326 MPa, improving it by 57.6% compared with the pipe not filled with guided wave materials. The fatigue life of the pipe with the filled waveguide material that was treated by LSP was extended by 48.9%, compared with the untreated pipe.

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“…Traditional surface strengthening technologies, such as rolling, shot peening, and other mechanical hardening methods are di cult to process parts with poor rigidity, such as thin-walled pipe, or improve the surface roughness of pipe ttings, which affects the pipe's sealing performance [3,4].…”

Section: Introductionmentioning

confidence: 99%

“…Once the pipe splits and produces oil leakage failure during ight, it will lead to catastrophic repercussions and pose a serious threat to ight safety. Pipe cracking is a prevalent problem in aeroengines, according to fault statistical studies[1], and the failure mode is mostly high cycle fatigue fracture [2].Traditional surface strengthening technologies, such as rolling, shot peening, and other mechanical hardening methods are di cult to process parts with poor rigidity, such as thin-walled pipe, or improve the surface roughness of pipe ttings, which affects the pipe's sealing performance [3,4].LSP is a surface modi cation method that uses a high-energy laser beam to generate a high-pressure plasma to impinge the material surface and generate residual compressive stress on the surface and subsurface that is bene cial to the fatigue performance of the part [5][6][7][8][9][10]. Compared to the typical shot peening procedure, the residual compressive stress layer generated has a signi cant depth and has little in uence on surface roughness [7][8][9].…”

mentioning

confidence: 99%

Optimization of residual stress field and improvement of fatigue properties of thin-walled pipes by filling laser shock peening

Wang²,

Zhao³

et al. 2022

Preprint

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In present work, a kind of filling laser shock peening (LSP) method is put forward and applied to thin-walled pipe. Specimens are experimentally and numerically investigated to identify the residual stress field and fatigue properties of pipe with and without LSP treatment. Numerical simulation indicates that the residual compressive stress increases first and subsequently drops as the laser power density increased, and the extent of influence of the stretching wave reflected from the lower surface on the unloaded area increases with the spot diameter causing surface tensile stress in the unloaded area. By filling the guided wave material within the pipe, the residual stress field of the pipe treated by LSP is optimized, and the influence of the stress wave reflection on the residual stress field is effectively decreased. The surface residual stress of the filled guided wave material is -326MPa, improving by 57.6% as compared with unfilled guided wave materials pipe. The fatigue life of the pipe with filled waveguide material treated by LSP is extended by 48.9% as compared with untreated pipe.

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Effect of High-Energy Shot Peening on Surface Nanocrystallization and Integrity of AISI 4140 Steel: A Numerical and Experimental Investigation

Cited by 6 publications

References 40 publications

Experimental Study on the Effect of Shot Peening and Re-Shot Peening on the Residual Stress Distribution and Fatigue Life of 20CrMnTi

Experimental Study on the Effect of Shot Peening and Re-Shot Peening on the Residual Stress Distribution and Fatigue Life of 20CrMnTi

Optimization of Residual Stress Field and Improvement of Fatigue Properties of Thin-Walled Pipes by Filling Laser Shock Peening

Optimization of residual stress field and improvement of fatigue properties of thin-walled pipes by filling laser shock peening

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