Residual stress distribution and elevated temperature fatigue behaviour of laser peened Ti-6Al-4V with a curved surface
International Journal of Fatigue(2022)
摘要
•Residual stress distribution was investigated in curved samples of laser peened Ti-6Al-4V.•Elevated temperature (300 °C) fatigue tests were done (R = −1) on similar curved samples.•Induced residual stress distribution was favorably retained at elevated temperature.•Crack initiation site shifted to a depth of ∼ 200 μm with 3 times increase in fatigue life at 400 MPa for the peened samples.•Fatigue striation spacings decreased for the peened samples.
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关键词
Laser peening,Residual stress,Elevated temperature fatigue,S-N curve,EBSD
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