TY - JOUR
T1 - Enhanced extra-long life fatigue resistance of a bimodal titanium alloy by laser shock peening
AU - Yang, Kun
AU - Huang, Qi
AU - Zhong, Bin
AU - Wang, Qingyuan
AU - Chen, Qiang
AU - Chen, Yao
AU - Su, Ning
AU - Liu, Hanqing
N1 - Funding Information:
The support from the National Natural Science Foundation of China (No. 11572057, No. 11832007, No. 11602038 and No. 11772209) are gratefully acknowledged. Moreover, Dr. Yang highly appreciates the financial support of Grant-in-Aid for JSPS Fellows (No. 19F19730). Thanks are due to Dr. Hongchao Qiao at Shenyang Institute of Automation, Chinese Academy of Sciences for the LSP treatments. We also thank Dr. Hong Zhang at Sichuan University for the assistance in the finite element analysis.
Funding Information:
The support from the National Natural Science Foundation of China (No. 11572057 , No. 11832007 , No. 11602038 and No. 11772209 ) are gratefully acknowledged. Moreover, Dr. Yang highly appreciates the financial support of Grant-in-Aid for JSPS Fellows (No. 19F19730 ). Thanks are due to Dr. Hongchao Qiao at Shenyang Institute of Automation, Chinese Academy of Sciences for the LSP treatments. We also thank Dr. Hong Zhang at Sichuan University for the assistance in the finite element analysis.
Publisher Copyright:
© 2020
PY - 2020/12
Y1 - 2020/12
N2 - Ultrasonic fatigue tests were performed on notched specimens to investigate high and very high cycle fatigue behaviors in the laser shock peened region of a compressor blade titanium alloy (Ti–8Al–1Mo–1V). The plastic deformation and compressive residual stress, induced by the laser shock peening (LSP), present gradient distributions along the depth direction. High-angle grain boundaries (HAGB, >15°) are increased by deformation twins, which are introduced into primary α phases during the plastic deformation. The enhancement in fatigue resistance is ascribed to the comprehensive retardation effects of the compressive residual stress, high-density dislocations, and HAGBs.
AB - Ultrasonic fatigue tests were performed on notched specimens to investigate high and very high cycle fatigue behaviors in the laser shock peened region of a compressor blade titanium alloy (Ti–8Al–1Mo–1V). The plastic deformation and compressive residual stress, induced by the laser shock peening (LSP), present gradient distributions along the depth direction. High-angle grain boundaries (HAGB, >15°) are increased by deformation twins, which are introduced into primary α phases during the plastic deformation. The enhancement in fatigue resistance is ascribed to the comprehensive retardation effects of the compressive residual stress, high-density dislocations, and HAGBs.
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U2 - 10.1016/j.ijfatigue.2020.105868
DO - 10.1016/j.ijfatigue.2020.105868
M3 - Article
AN - SCOPUS:85089271804
SN - 0142-1123
VL - 141
JO - International Journal of Fatigue
JF - International Journal of Fatigue
M1 - 105868
ER -