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

被引：0

作者：

Ren, Chonggang ^{[1
]}

Shang, Deguang ^{[1
]}

Nai, Changgang ^{[1
]}

Wang, Lu ^{[1
]}

Chen, Tao ^{[2
]}

机构：

[1] Beijing Univ Technol, Coll Mech Engn & Appl Elect Technol, Beijing 100124, Peoples R China

[2] Beijing Univ Technol, Inst Laser Engn, Beijing, Peoples R China

来源：

MATERIALS PROCESSING TECHNOLOGY II, PTS 1-4 | 2012年 / 538-541卷

基金：

中国国家自然科学基金;

关键词：

Healing fatigue damage; Laser surface irradiation; Residual stress; Metallograph; THIN-FILMS; STEEL;

D O I：

10.4028/www.scientific.net/AMR.538-541.1866

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The mechanism of healing fatigue damage was investigated by pulsed laser surface irradiation for polycrystalline copper film, X-ray Diffraction(XRD), optical microscopic. 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 properties. 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.

引用

页码：1866 / +

页数：2

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