Microstructure characteristics and formation mechanism of TC17 titanium alloy induced by laser shock processing

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	Microstructure characteristics and formation mechanism of TC17 titanium alloy induced by laser shock processing
	Yang Y(杨扬); Qiao HC(乔红超); Zhang, Hua
刊名	Journal of Alloys and Compounds
	2017
卷号	722 页码:509-516
关键词	LSP Ultrahigh strain rate Dynamic recrystallization Microstructural characteristics TC17 titanium alloy
ISSN号	0925-8388
通讯作者	Yang Y(杨扬)
产权排序	3
中文摘要	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.
WOS标题词	Science & Technology ; Physical Sciences ; Technology
类目[WOS]	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
研究领域[WOS]	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
关键词[WOS]	STACKING-FAULT ENERGY ; SURFACE NANOCRYSTALLIZATION ; DEFORMATION ; EVOLUTION ; TI-5AL-2SN-2ZR-4MO-4CR ; TEMPERATURE ; REFINEMENT ; CRACK
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000405520400067
内容类型	期刊论文
源URL	[http://ir.sia.cn/handle/173321/20725]
专题	沈阳自动化研究所_装备制造技术研究室
作者单位	1.Shenyang Institute of Automation, Chinese Academy of Science, Shenyang 110016, China 2.School of Material Science and Engineering, Central South University, Changsha, 410083, China 3.Key Laboratory of Ministry of Education for Nonferrous Metal Materials Science and Engineering, Central South University, Changsha, 410083, China
推荐引用方式 GB/T 7714	Yang Y,Qiao HC,Zhang, Hua. Microstructure characteristics and formation mechanism of TC17 titanium alloy induced by laser shock processing[J]. Journal of Alloys and Compounds,2017,722:509-516.
APA	Yang Y,Qiao HC,&Zhang, Hua.(2017).Microstructure characteristics and formation mechanism of TC17 titanium alloy induced by laser shock processing.Journal of Alloys and Compounds,722,509-516.
MLA	Yang Y,et al."Microstructure characteristics and formation mechanism of TC17 titanium alloy induced by laser shock processing".Journal of Alloys and Compounds 722(2017):509-516.