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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.
Source PublicationACTA MECHANICA SINICA
2016
Volume32Issue:2Pages:301-308
ISSN0567-7718
Abstract

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.

KeywordLaser Shock Peening Gradient Hardened Layer Plastically Affected Depth Impact Toughness Cleavage Fracture
DOI10.1007/s10409-015-0521-7
Indexed BySCI ; EI ; CSCD
Language英语
WOS IDWOS:000376085100012
WOS KeywordFracture-toughness ; Grain-refinement ; Residual-stress ; Heat-treatment ; Alloy ; Indentation
WOS Research AreaEngineering, Mechanical ; Mechanics
Funding OrganizationThe 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.
DepartmentLMFS冲击与耦合效应(LHO)
Classification二类
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/71953
Collection流固耦合系统力学重点实验室
Corresponding AuthorWei, YP (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China.
Recommended Citation
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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