Deformation and fracture mechanisms of gradient nanograined pure Ti produced by a surface rolling treatment

doi:10.1016/j.msea.2019.03.080

CORC > 兰州理工大学 > 兰州理工大学 > 省部共建有色金属先进加工与再利用国家重点实验室

	Deformation and fracture mechanisms of gradient nanograined pure Ti produced by a surface rolling treatment
	Wang, Qi 3; Ren, Junqiang 2; Wang, Yinling 3; Xin, Chao 1; Xiao, Lin 1; Yang, Dan 2
刊名	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
	2019-04-29
卷号	754 页码:121-128
关键词	Pure titanium Gradient nanograined Deformation mechanism Fracture mechanism
ISSN号	0921-5093
DOI	10.1016/j.msea.2019.03.080
英文摘要	Gradient nanograined Ti (GNG Ti) samples were produced by a surface rolling treatment. The mechanical properties were evaluated by microhardness and tensile tests. The results indicated that GNG Ti achieved an optimized combination of strength and ductility relative to the free-standing nano/ultrafine-grained Ti. The deformation and fracture mechanisms were studied using transmission electron microscope (TEM) and scanning electron microscope (SEM). As the grain size reduced from the coarse-grained (CG) matrix to the nano/ultrafinegrained (NG/UFG) layer, the transition from conventional plastic deformation mechanisms, such as dislocation activity and twinning deformation, to grain boundary-mediated deformation mechanisms, such as stress-inducing grain growth, was identified. At the early stage of tensile deformation, the microcracks were first initiated in the CG and deformed grain (DG) regions rather than in the NG/UFG region and the CG/DG interface had a deflection effect on crack propagation. After tensile failure, the fracture morphology showed a mixture of ductile dimples and shear band-like regions.
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000466249400013
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/155351]
专题	省部共建有色金属先进加工与再利用国家重点实验室
作者单位	1.Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Shaanxi, Peoples R China 2.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Gansu, Peoples R China; 3.Huanghuai Univ, Zhumadian 463000, Henan, Peoples R China;
推荐引用方式 GB/T 7714	Wang, Qi,Ren, Junqiang,Wang, Yinling,et al. Deformation and fracture mechanisms of gradient nanograined pure Ti produced by a surface rolling treatment[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2019,754:121-128.
APA	Wang, Qi,Ren, Junqiang,Wang, Yinling,Xin, Chao,Xiao, Lin,&Yang, Dan.(2019).Deformation and fracture mechanisms of gradient nanograined pure Ti produced by a surface rolling treatment.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,754,121-128.
MLA	Wang, Qi,et al."Deformation and fracture mechanisms of gradient nanograined pure Ti produced by a surface rolling treatment".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 754(2019):121-128.