Journal
VACUUM
Volume 164, Issue -, Pages 41-45Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.vacuum.2019.02.030
Keywords
2024-T351 aluminum alloy; Cryogenic laser peening; Fatigue properties; Nano-hardness; Microstructure
Funding
- National Natural Science Foundation of China [51575247, 51775252]
- Graduate Scientific Research Innovation Plan of Jiangsu Province [KYCX17_1760]
- China Postdoctoral Science Foundation [2018M630526]
- Opening Project of Jiangsu Key Laboratory of Large Engineering Equipment Detection and Control [JSKLEDC201501, JSKLEDC201503]
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The tensile fatigue performance of 2024-T351 aluminum alloy processed by room temperature laser peening (RT-LP) and cryogenic laser peening (CLP) were explored. The nanoindentation measurement was performed. Scanning electron microscopic and transmission electron microscopic were used to inspect the microstructure evolution. Experimental results indicated that tensile fatigue life of the specimen subjected to CLP increased by 6.8% when compared with the RT-LP specimen. Additionally, CLP could induce finer grain and higher-density of dislocation structure, which have an important contribution to improving the nano-hardness and tensile fatigue properties of 2024-T351 aluminum alloy.
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