Abstract
A Nd:YAG nanosecond pulsed laser was used to carry out laser peening and cryogenic laser peening (CLP) experiments at room temperature (25°C) and cryogenic temperature (
−
100
∘
C
), respectively, on the vibration fatigue life of 2024-T351 aluminum alloy. It was found that CLP induced a higher amplitude of compressive residual stress and improved the nano-hardness and the elastic modulus. Compared to the LP-ed samples, the fatigue life of the CLP-ed specimens was higher, and the initiation and propagation of fatigue cracks were more effectively inhibited. Therefore, CLP can effectively improve the fatigue performance of aluminum alloys.
Funder
Postdoctoral Research Foundation of China
Postdoctoral Science Foundation of Jiangsu Province
Subject
Atomic and Molecular Physics, and Optics,Engineering (miscellaneous),Electrical and Electronic Engineering