Mechanism of Healing Fatigue Damage by Pulsed Laser Surface Irradiation for Polycrystalline Copper Film

Mechanism of Healing Fatigue Damage by Pulsed Laser Surface Irradiation for Polycrystalline Copper Film
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DOI：
10.4028/www.scientific.net/amr.538-541.1866
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发表时间：
2012-06
期刊：
Advanced Materials Research
影响因子：
--
通讯作者：
Chong-Gang Ren;D. Shang;C. Nai;Lu Wang;Tao Chen
Chong-Gang Ren;D. Shang;C. Nai;Lu Wang;Tao Chen
中科院分区：
其他
文献类型：
--
作者：
Chong-Gang Ren;D. Shang;C. Nai;Lu Wang;Tao Chen

文献摘要

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The mechanism of healing fatigue damage was investigated by pulsed laser surface irradiation for polycrystalline copper film, X-ray Diffraction(XRD), optical microscopic and scanning electron microscopy(SEM). The results indicate that surface melting and grain refinement were found in the melted surface layer. Tensile residual stresses were introduced in the resolidified surface layer due to laser surface melting which produced deleterious effect on fatigue property. Remelting and grain refinement in the surface layer is mainly responsible for healing fatigue damage and fatigue life improvement. The fatigue damage could be healed completely or partly by laser surface irradiation under the proper parameters of laser treatment for the specimens.