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摘要:
The mechanism of fatigue life improvement for damaged and undamaged copper film specimens with thickness of 25um was investigated by laser surface irradiation under optimal parameters of laser irradiation at different loading levels. The results showed that the degree of improvement in fatigue life for the damaged specimens is more evident when the applied nominal stress was larger. The hardening induced by laser irradiation and a smooth surface feature can be obtained after the laser irradiation treatment, which results in fatigue life to be extended. A fatigue life prediction method was proposed by the view of equivalent stress. The predicted lives by the proposed prediction method were in good agreement with the experimental results.
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来源 :
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
ISSN: 8756-758X
年份: 2015
期: 3
卷: 38
页码: 330-339
3 . 7 0 0
JCR@2022
ESI学科: MATERIALS SCIENCE;
ESI高被引阀值:319
JCR分区:1
中科院分区:3