Cyclic deformation behavior of non-isoaxial copper tricrystals and bicrystals

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	Cyclic deformation behavior of non-isoaxial copper tricrystals and bicrystals
	Jia, WP; Li, SX; Wang, ZG; Li, XW; Li, GY
通讯作者	Jia, WP()
	1999-05-28
发表期刊	ACTA MATERIALIA
ISSN	1359-6454
卷号	47 期号:7 页码:2165-2176
摘要	The cyclic hardening and saturation behaviors of copper tricrystals and bicrystals were investigated in strain-controlled multiple step tests. The results show that, for the inclined grain boundary (GB) bicrystal with single slip components, the cyclic stress strain (CSS) curve exhibits a plateau or quasi-plateau region, while the CSS curve of tricrystals shows no plateau. Observations of surface morphologies indicated that owing to the strain incompatibility of three grains, at lower strain amplitude the triple junction (TJ) retards obviously the primary slip in grains and makes deformation near it smaller than that near the bicrystal GB, while at higher strain amplitude slip can be distributed near the TJ homogeneously. The probability of crack initiation at the same TJ is closely related to the loading direction. The saturation dislocation structures of tricrystal specimens under the strain amplitude of the last step were explored by the electron channeling contrast technique in SEM (ECC-SEM). Loop patches with persistent slip band (PSB) ladders embedded were found even in the TJ vicinity for all grains. Dislocation-free zones (DFZ) occurred in the vicinity of TJ and GB, and the difference in shapes between them is due to the difference in internal stress field. Misoriented cell structure and dislocation wall structure were found near the crack tip, and the formation of them is associated with the cooperative action of crack tip, GB, grain orientation and the applied strain amplitude. (C) 1999 Acta Metallurgica Inc. Published by Elsevier, Science Ltd. All rights reserved.
收录类别	SCI
语种	英语
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000080811600015
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：17[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/109908
专题	中国科学院金属研究所
通讯作者	Jia, WP
作者单位	Chinese Acad Sci, Met Res Inst, State Key Lab Fatigue & Fracture Mat, Shenyang 110015, Peoples R China
推荐引用方式 GB/T 7714	Jia, WP,Li, SX,Wang, ZG,et al. Cyclic deformation behavior of non-isoaxial copper tricrystals and bicrystals[J]. ACTA MATERIALIA,1999,47(7):2165-2176.
APA	Jia, WP,Li, SX,Wang, ZG,Li, XW,&Li, GY.(1999).Cyclic deformation behavior of non-isoaxial copper tricrystals and bicrystals.ACTA MATERIALIA,47(7),2165-2176.
MLA	Jia, WP,et al."Cyclic deformation behavior of non-isoaxial copper tricrystals and bicrystals".ACTA MATERIALIA 47.7(1999):2165-2176.