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Dynamic response and residual stress fields of Ti6Al4V alloy under shock wave induced by laser shock peening
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)
Department装备制造技术研究室
Source PublicationMODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING
ISSN0965-0393
2017
Volume25Issue:6Pages:1-16
Indexed BySCI ; EI
EI Accession number20173304046394
WOS IDWOS:000406382400001
Contribution Rank6
Funding OrganizationNational 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]
KeywordLaser Shock Peening Fem Simulation Dynamic Response Residual Stress Fields
AbstractLaser 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.
Language英语
WOS HeadingsScience & Technology ; Technology ; Physical Sciences
WOS SubjectMaterials Science, Multidisciplinary ; Physics, Applied
WOS KeywordFINITE-ELEMENT-ANALYSIS ; TI-6AL-4V ALLOY ; ALUMINUM-ALLOY ; SIMULATION ; BEHAVIOR ; PHYSICS
WOS Research AreaMaterials Science ; Physics
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Document Type期刊论文
Identifierhttp://ir.sia.cn/handle/173321/20810
Collection智能产线与系统研究室
Corresponding AuthorPeng, Peng
Affiliation1.School of Mechanical Engineering and Automation, Beihang University, Beijing, 100191, China
2.China Academy of Space Technology, Beijing, 100094, China
3.International Research Institute for Multidisciplinary Science, Beihang University, Beijing, 100191, China
4.AVIC the First Aircraft Institute, Xi'an, 710089, China
5.Key Laboratory for High Energy Density Beam Processing Technology, Beijing Aeronautical Manufacturing Technology Research Institute, Beijing, 100024, China
6.Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, China
Recommended Citation
GB/T 7714
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.
APA Sun, Rujian.,Li, Liuhe.,Zhu, Ying.,Zhang, Lixin.,Guo, Wei.,...&Qiao HC.(2017).Dynamic response and residual stress fields of Ti6Al4V alloy under shock wave induced by laser shock peening.MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING,25(6),1-16.
MLA Sun, Rujian,et al."Dynamic response and residual stress fields of Ti6Al4V alloy under shock wave induced by laser shock peening".MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING 25.6(2017):1-16.
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