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摘要:
In this study, the optimum laser process parameter was determined by fatigue experiment for the treated copper film specimens with thickness of 25 mu m. The mechanism of healing fatigue damage was analyzed by the numerical simulation of temperature field induced by laser irradiation and the microstructure changes on the surface of specimens. The results showed that the fatigue damage of copper film specimens can be healed when the applied energy density is in the range from 4x10(3) J/m(2) to 14x10(3) J/m(2), and the fatigue life can increase by about 5 times when the applied energy density is 7x10(3) J/m(2). The process hardening and grain refinement in the surface layer are mainly responsible for extending fatigue life.
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来源 :
JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY
ISSN: 1738-494X
年份: 2014
期: 4
卷: 28
页码: 1257-1264
1 . 6 0 0
JCR@2022
ESI学科: ENGINEERING;
ESI高被引阀值:176
JCR分区:3
中科院分区:4
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