Cyclic deformation behavior and dislocation structures of [001] copper single crystals .2. Characteristics of dislocation structures

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	Cyclic deformation behavior and dislocation structures of [001] copper single crystals .2. Characteristics of dislocation structures
	Wang, ZR; Gong, B; Wang, ZG
刊名	ACTA MATERIALIA
	1997-04-01
卷号	45 期号:4 页码:1379-1391
ISSN号	1359-6454
通讯作者	Wang, ZR()
英文摘要	The dislocation structure of[001] Cu single crystals developed in cyclic deformation has been systematically studied with transmission electron microscopy and related to the mechanical behavior presented previously. The dislocation configuration for this orientation is characterized by labyrinth structures over all the strain amplitudes investigated. At high strain amplitudes (gamma(pl) = 1.8 x 10(-3)- 3.0 x 10(-3)), additional structures such as exclusive walls and strips were observed. The strips are parallel to {111} slip planes and are associated with macro-deformation bands reported previously. At low strain amplitudes (gamma(pl) less than or equal to 2.4 x 10(-4)), however, labyrinth becomes irregular in geometrical shape. Labyrinth structures consist of two types of perpendicular walls: one is always parallel to (001) plane and the other may be (100), (210) or (120). The characteristic dimension of labyrinths, such as channel width, increases with decreasing applied strain amplitude. The nature of dislocations in labyrinth structures was identified to be mainly primary and critical dislocations. The role of labyrinth structures in cyclic deformation was discussed in terms of geometrical considerations. It has been shown that labyrinth structures are more favorable to cyclic deformation by promoting multiple slip and cross slip. Finally, the cyclic saturation stress was quantitatively correlated with the microparameter of labyrinth structures. (C) 1997 Acta Metallurgica Inc.
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:A1997WR62600006
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/126856]
专题	金属研究所_中国科学院金属研究所
通讯作者	Wang, ZR
作者单位	CHINESE ACAD SCI,MET RES INST,STATE KEY LAB FATIGUE & FRACTURE MAT,SHENYANG,PEOPLES R CHINA
推荐引用方式 GB/T 7714	Wang, ZR,Gong, B,Wang, ZG. Cyclic deformation behavior and dislocation structures of [001] copper single crystals .2. Characteristics of dislocation structures[J]. ACTA MATERIALIA,1997,45(4):1379-1391.
APA	Wang, ZR,Gong, B,&Wang, ZG.(1997).Cyclic deformation behavior and dislocation structures of [001] copper single crystals .2. Characteristics of dislocation structures.ACTA MATERIALIA,45(4),1379-1391.
MLA	Wang, ZR,et al."Cyclic deformation behavior and dislocation structures of [001] copper single crystals .2. Characteristics of dislocation structures".ACTA MATERIALIA 45.4(1997):1379-1391.