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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
Corresponding AuthorWang, ZR()
1997-04-01
Source PublicationACTA MATERIALIA
ISSN1359-6454
Volume45Issue:4Pages:1379-1391
AbstractThe 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.
Indexed BySCI
Language英语
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:A1997WR62600006
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Cited Times:40[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/126857
Collection中国科学院金属研究所
Corresponding AuthorWang, ZR
AffiliationCHINESE ACAD SCI,MET RES INST,STATE KEY LAB FATIGUE & FRACTURE MAT,SHENYANG,PEOPLES R CHINA
Recommended Citation
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.
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