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题名:
Dynamic response and residual stress fields of Ti6Al4V alloy under shock wave induced by laser shock peening
作者: Sun, Rujian; Li, Liuhe; Zhu, Ying; Zhang, Lixin; Guo, Wei; Peng, Peng; Li, Bo; Guo, Chao; Liu, Lei; Che, Zhigang; Li, Weidong; Sun, Jianfei; Qiao HC(乔红超)
作者部门: 装备制造技术研究室
通讯作者: Peng, P (reprint author), Beihang Univ, Sch Mech Engn & Automat, Beijing 100191, Peoples R China. ; Peng, P (reprint author), Beihang Univ, Int Res Inst Multidisciplinary Sci, Beijing 100191, Peoples R China.
关键词: laser shock peening ; FEM simulation ; dynamic response ; residual stress fields
刊名: MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING
ISSN号: 0965-0393
出版日期: 2017
卷号: 25, 期号:6, 页码:1-16
收录类别: SCI ; EI
产权排序: 6
项目资助者: National International Collaborative Science and Technology Research Project China [2013DFR50590] ; National Natural Science Foundation of China [51675030, 51605019, 51501219] ; Natural Science Foundation of Liaoning Province [2015020115]
摘要: Laser shock peening (LSP), an innovative surface treatment technique, generates compressive residual stress on the surface of metallic components to improve their fatigue performance, wear resistance and corrosion resistance. To illustrate the dynamic response during LSP and residual stress fields after LSP, this study conducted FEM simulations of LSP in a Ti6Al4V alloy. Results showed that when power density was 7 GW cm(-2), a plastic deformation occurred at 10 ns during LSP and increased until the shock pressure decayed below the dynamic yield strength of Ti6Al4V after 60 ns. A maximum tensile region appeared beneath the surface at around 240 ns, forming a compressive-tensile-compressive stress sandwich structure with a thickness of 98, 1020 and 606 mu m for each layer. After the model became stabilized, the value of the surface residual compressive stress was 564 MPa at the laser spot center. Higher value of residual stress across the surface and thicker compressive residual stress layers were achieved by increasing laser power density, impact times and spot sizes during LSP. A 'Residual stress hole' occurred with a high laser power density of 9 GW cm(-2) when laser pulse duration was 10 ns, or with a long laser pulse duration of 20 ns when laser power density was 7GW cm(-2) for Ti6Al4V. This phenomenon occurred because of the permanent reverse plastic deformation generated at laser spot center.
语种: 英语
EI收录号: 20173304046394
WOS记录号: WOS:000406382400001
WOS标题词: Science & Technology ; Technology ; Physical Sciences
类目[WOS]: Materials Science, Multidisciplinary ; Physics, Applied
关键词[WOS]: FINITE-ELEMENT-ANALYSIS ; TI-6AL-4V ALLOY ; ALUMINUM-ALLOY ; SIMULATION ; BEHAVIOR ; PHYSICS
研究领域[WOS]: Materials Science ; Physics
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内容类型: 期刊论文
URI标识: http://ir.sia.cn/handle/173321/20810
Appears in Collections:装备制造技术研究室_期刊论文

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Recommended Citation:
Sun, Rujian,Li, Liuhe,Zhu, Ying,et al. Dynamic response and residual stress fields of Ti6Al4V alloy under shock wave induced by laser shock peening[J]. MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING,2017,25(6):1-16.
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