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题名:
Microstructure characteristics and formation mechanism of TC17 titanium alloy induced by laser shock processing
作者: Yang Y(杨扬); Zhang, Hua; Qiao HC(乔红超)
作者部门: 装备制造技术研究室
通讯作者: 杨扬
关键词: LSP ; Ultrahigh strain rate ; Dynamic recrystallization ; Microstructural characteristics ; TC17 titanium alloy
刊名: Journal of Alloys and Compounds
ISSN号: 0925-8388
出版日期: 2017
卷号: 722, 页码:509-516
收录类别: SCI ; EI
产权排序: 3
项目资助者: National Natural Science Foundation of China (No. 51574290, 51274245), NSAF (No.U1330126)
摘要: As one of the surface strengthening technologies, laser shock processing (LSP) can form a gradient refined surface layer in metallic materials. The gradient microstructural characteristics of TC17 titanium alloy induced by ultrahigh strain rate deformation in LSP were systemically examined by transmission electron microscope (TEM). The microstructure near substrate consisted of dislocations and deformation twins with high density; The microstructures featured of dislocation tangles, dislocation cells and subgrains closer to the surface, and the deformation twins became less prevalent due to higher strains and strain rates where there were insufficient time for atoms to reposition to the twinned orientation to accomplish the twinning deformation; The original coarse grains with size of tens of micrometers (average grain size 43 μm) were refined instantly to hundreds of nanometers (average grain size 396 nm) in the top surface of TC17 titanium alloy after LSP, which was the result of rotation dynamic recrystallization (RDR) proved with quantitative calculation of recrystallization kinetics. There was a gradient distribution of hardness values of the LSPed surface layer.
语种: 英语
EI收录号: 20172503802983
WOS记录号: WOS:000405520400067
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.sia.cn/handle/173321/20725
Appears in Collections:装备制造技术研究室_期刊论文

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Recommended Citation:
Yang Y,Zhang, Hua,Qiao HC. Microstructure characteristics and formation mechanism of TC17 titanium alloy induced by laser shock processing[J]. Journal of Alloys and Compounds,2017,722:509-516.
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