Surface topography evolution of Ni-based single crystal superalloy under laser shock: Formation of the nano-scale surface reliefs

Lu, Guoxin; Liu, J. D.; Qiao, Hongchao; Zhou, Yan; Jin, Tao; Sun, Xiaofeng; Hu, Z.Q.

doi:10.1007/s00339-017-0814-8

Cited by 5 publications

References 30 publications

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Effects of high-energy laser peening followed by pre-hot corrosion on stress relaxation, microhardness, and fatigue life and strength of single-crystal nickel CMSX-4® superalloy

Morar

Holtham

Hackel

et al. 2023

Int J Adv Manuf Technol

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This study investigated the stress relaxation and fatigue life and strength of laser-peened single-crystal nickel superalloy specimens compared to unpeened and shot-peened specimens following hot corrosion exposure and then fatigue testing. The specimens were treated by conventional laser peening and a new cyclic laser peening plus thermal microstructure engineering process. The latter treatment supports the benefit of a unique process involving application of layers of laser peening using high energy with large footprint spots combined with interspersed cyclic annealing. Stress measurements by slitting showed the plastic penetration depth of laser peening exceeded shot peening by a factor of 24. Unpeened and peened specimens were exposed to sulphate corrosives at 700 °C for 300 h and then fatigue tested. Tests of five non-laser-peened specimens all failed in low-cycle fatigue regime, whereas three identically tested laser-peened specimens all achieved multi-million-cycle runout without failure, indicating fully consistent large benefit for life by laser peening. Additional tests also showed fatigue strength improvement of 2:1 by laser peening. Residual stress measurements post hot-corrosion exposure and fatigue testing showed notable 5 mm depth retention of residual eigenstress in a laser-peened specimen.

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Effects of high-energy laser peening followed by pre-hot corrosion on stress relaxation, microhardness, and fatigue life and strength of single-crystal nickel CMSX-4® superalloy

Morar

Holtham

Hackel

et al. 2023

Int J Adv Manuf Technol

View full text Add to dashboard Cite

show abstract

Brush-electroplated rGO@MnO2 composite supported on carbon cloth for flexible high-performance supercapacitor electrodes

Zhu

et al. 2022

J Mater Sci: Mater Electron

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Nanosecond pulsed laser-generated stress effect inducing macro-micro-nano structures and surface topography evolution

Sokol

Zhang

et al. 2019

Applied Materials Today

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Surface topography evolution of Ni-based single crystal superalloy under laser shock: Formation of the nano-scale surface reliefs

Cited by 5 publications

References 30 publications

Effects of high-energy laser peening followed by pre-hot corrosion on stress relaxation, microhardness, and fatigue life and strength of single-crystal nickel CMSX-4® superalloy

Effects of high-energy laser peening followed by pre-hot corrosion on stress relaxation, microhardness, and fatigue life and strength of single-crystal nickel CMSX-4® superalloy

Brush-electroplated rGO@MnO2 composite supported on carbon cloth for flexible high-performance supercapacitor electrodes

Nanosecond pulsed laser-generated stress effect inducing macro-micro-nano structures and surface topography evolution

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