In-situ observation of dislocation dynamics near heterostructured interfaces

doi:10.1080/21663831.2019.1616330

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	In-situ observation of dislocation dynamics near heterostructured interfaces
	Zhou H; Huang CX; Sha XC; Xiao LR; Ma XL; Hoeppel HW; Goeken M; Wu XL(武晓雷); Ameyama K; Han XD
刊名	MATERIALS RESEARCH LETTERS
	2019
卷号	7 期号:9 页码:376-382
关键词	Heterostructured materials deformation mechanism Frank-Read source in-situ TEM
ISSN号	2166-3831
DOI	10.1080/21663831.2019.1616330
通讯作者	Han, Xiaodong(xdhan@bjut.edu.cn) ; Zhu, Yuntian(ytzhu@ncsu.edu)
英文摘要	There has been a long-standing controversy on how dislocations interact with interfaces. Here we report in-situ observations that in a Cu-brass heterostructured TEM film Frank-Read sources are the primary dislocation sources. They were dynamically formed and deactivated throughout the deformation in grain interior, which has never been reported before. This observation indicates that strain gradient near interfaces cannot be quantitatively related to the density gradient of geometrically necessary dislocations, and it was primarily produced by Frank-Read source gradient instead of dislocation pile-ups. These findings provide new insights on how to design heterostructured interfaces to enhance mechanical properties. [GRAPHICS]
分类号	一类
资助项目	National Key R&D Program of China[2017YFB0204403] ; National Natural Science Foundation of China[51601003] ; National Natural Science Foundation of China[11672195] ; Fundamental Research Funds for the Central Universities[30918011342] ; Fundamental Research Funds for the Central Universities[30919011412] ; Sichuan Youth Science and Technology Foundation[2016JQ0047] ; US Army Research Office ; Materials Characterization and Research Center of Nanjing University of Science and Technology ; Jiangsu Key Laboratory of Advanced Micro & Nano Materials and Technology
WOS关键词	PLASTIC-DEFORMATION ; GRAIN ROTATION ; NANOCRYSTALLINE ; MECHANISMS ; DUCTILITY ; BOUNDARY ; STRENGTH ; SLIP
WOS研究方向	Materials Science
语种	英语
WOS记录号	WOS:000471551600005
资助机构	National Key R&D Program of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Sichuan Youth Science and Technology Foundation ; US Army Research Office ; Materials Characterization and Research Center of Nanjing University of Science and Technology ; Jiangsu Key Laboratory of Advanced Micro & Nano Materials and Technology
其他责任者	Han, Xiaodong ; Zhu, Yuntian
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/79367]
专题	力学研究所_非线性力学国家重点实验室
推荐引用方式 GB/T 7714	Zhou H,Huang CX,Sha XC,et al. In-situ observation of dislocation dynamics near heterostructured interfaces[J]. MATERIALS RESEARCH LETTERS,2019,7(9):376-382.
APA	Zhou H.,Huang CX.,Sha XC.,Xiao LR.,Ma XL.,...&Zhu YT.(2019).In-situ observation of dislocation dynamics near heterostructured interfaces.MATERIALS RESEARCH LETTERS,7(9),376-382.
MLA	Zhou H,et al."In-situ observation of dislocation dynamics near heterostructured interfaces".MATERIALS RESEARCH LETTERS 7.9(2019):376-382.