Impact toughness of a gradient hardened layer of Cr5Mo1V steel treated by laser shock peening | |
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. | |
发表期刊 | ACTA MECHANICA SINICA |
2016 | |
卷号 | 32期号:2页码:301-308 |
ISSN | 0567-7718 |
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. |
关键词 | Laser Shock Peening Gradient Hardened Layer Plastically Affected Depth Impact Toughness Cleavage Fracture |
DOI | 10.1007/s10409-015-0521-7 |
收录类别 | SCI ; EI ; CSCD |
语种 | 英语 |
WOS记录号 | WOS:000376085100012 |
关键词[WOS] | Fracture-toughness ; Grain-refinement ; Residual-stress ; Heat-treatment ; Alloy ; Indentation |
WOS研究方向 | Engineering, Mechanical ; Mechanics |
项目资助者 | 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. |
课题组名称 | LMFS冲击与耦合效应(LHO) |
论文分区 | 二类 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://dspace.imech.ac.cn/handle/311007/71953 |
专题 | 流固耦合系统力学重点实验室 |
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. |
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