中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Impact toughness of a gradient hardened layer of Cr5Mo1V steel treated by laser shock peening

文献类型:期刊论文

作者Xia WG(夏伟光); Li L(李磊); Wei YP(魏延鹏); Zhao AM; Guo YC(郭雅悰); Huang CG(黄晨光); Yin HX; Zhang LC; Wei, YP (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China.
刊名ACTA MECHANICA SINICA
出版日期2016
卷号32期号:2页码:301-308
关键词Laser Shock Peening Gradient Hardened Layer Plastically Affected Depth Impact Toughness Cleavage Fracture
ISSN号0567-7718
DOI10.1007/s10409-015-0521-7
文献子类Article
英文摘要

Laser shock peening (LSP) is a widely used surface treatment technique that can effectively improve the fatigue life and impact toughness of metal parts. Cr5Mo1V steel exhibits a gradient hardened layer after a LSP process. A new method is proposed to estimate the impact toughness that considers the changing mechanical properties in the gradient hardened layer. Assuming a linearly gradient distribution of impact toughness, the parameters controlling the impact toughness of the gradient hardened layer were given. The influences of laser power densities and the number of laser shots on the impact toughness were investigated. The impact toughness of the laser peened layer improves compared with an untreated specimen, and the impact toughness increases with the laser power densities and decreases with the number of laser shots. Through the fracture morphology analysis by a scanning electron microscope, we established that the Cr5Mo1V steel was fractured by the cleavage fracture mechanism combined with a few dimples. The increase in the impact toughness of the material after LSP is observed because of the decreased dimension and increased fraction of the cleavage fracture in the gradient hardened layer.

分类号二类
WOS关键词Fracture-toughness ; Grain-refinement ; Residual-stress ; Heat-treatment ; Alloy ; Indentation
WOS研究方向Engineering, Mechanical ; Mechanics
语种英语
WOS记录号WOS:000376085100012
资助机构The project was supported by the National Natural Science Foundation of China (Grants 11002150, 11332011, and 11402277) and the Basic Research Equipment Project of the Chinese Academy of Sciences (YZ200930) for financial support.
源URL[http://dspace.imech.ac.cn/handle/311007/71953]  
专题力学研究所_流固耦合系统力学重点实验室(2012-)
通讯作者Wei, YP (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China.
推荐引用方式
GB/T 7714
Xia WG,Li L,Wei YP,et al. Impact toughness of a gradient hardened layer of Cr5Mo1V steel treated by laser shock peening[J]. ACTA MECHANICA SINICA,2016,32(2):301-308.
APA Xia WG.,Li L.,Wei YP.,Zhao AM.,Guo YC.,...&Wei, YP .(2016).Impact toughness of a gradient hardened layer of Cr5Mo1V steel treated by laser shock peening.ACTA MECHANICA SINICA,32(2),301-308.
MLA Xia WG,et al."Impact toughness of a gradient hardened layer of Cr5Mo1V steel treated by laser shock peening".ACTA MECHANICA SINICA 32.2(2016):301-308.

入库方式: OAI收割

来源:力学研究所

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