Effect of Laser Irradiation Parameters on Healing Fatigue Damage for Polycrystalline Copper Film
Effect of Laser Irradiation Parameters on Healing Fatigue Damage for Polycrystalline Copper Film
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DOI：
10.4028/www.scientific.net/amm.217-219.2270
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发表时间：
2012-11
期刊：
影响因子：
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通讯作者：
C. Nai;D. Shang;Chong-Gang Ren;Lu Wang;Xiao Dong Liu;Hong Chen;Tao Chen
中科院分区：
文献类型：
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作者：
C. Nai;D. Shang;Chong-Gang Ren;Lu Wang;Xiao Dong Liu;Hong Chen;Tao Chen
本文通过对厚度为25μm的铜膜试件进行激光辐照，研究了激光参数对铜膜疲劳寿命的影响。结果表明，激光参数对原始试件的强化和疲劳损伤试件的愈合有很大影响，疲劳损伤试件愈合后的疲劳总寿命比强化后的原始试件长。根据不同激光辐照条件下的疲劳寿命结果，确定了最佳激光辐照参数。用扫描电镜观察了断口形貌。结果表明，在最佳激光参数条件下，试样表面形成致密层，柱状晶得到细化，提高了试样的疲劳寿命。
In this paper, the effect of laser parameters on fatigue life was investigated by laser irradiation for the undamaged and pre-damaged copper film specimens with thickness of 25μm. The results showed that the laser parameters have a great impact on the strengthening of original specimens and the healing of specimens with fatigue damage, and total fatigue life of the healed specimen with fatigue damage was longer than that of the strengthened original specimen. According to the obtained fatigue life results under different laser irradiation conditions, the optimal laser parameters were identified. The fracture morphology was observed by SEM. The results showed that, under the optimal laser parameters condition, a dense layer was found on the surface of specimen and the columnar grains were refined, which results in increasing the total fatigue life of the specimen.