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Cyclic deformation features of a copper bicrystal with an embedded grain and surrounding grain boundary
Zhang, ZF; Wang, ZG
Corresponding AuthorZhang, ZF()
1999-11-01
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume271Issue:1-2Pages:449-457
AbstractCyclic stress-strain response, surface slip morphology and saturation dislocation patterns in a copper bicrystal with an embedded grain G(E) and a surrounding grain boundary (GB) were investigated and compared with those of its matrix monocrystal by multi-step cyclic straining at room temperature in air. The experimental results showed that the cyclic stress-strain (CSS) curve of the matrix monocrystal exhibited a plateau region with the saturation resolved shear stresses of 28.8-29.4 MPa in the plastic resolved shear strain range of 4.7 x 10(-4)-3.18 x 10(-3). However, the copper bicrystal displayed relatively higher saturation stresses of 32.2-36.0 MPa, if modified by the orientation factor of the matrix grain, indicating no apparent plateau region in its CSS curve. Surface observations revealed that the primary slip system was dominant in both grains G(M) and G(E) except near the surrounding GB. By the electron channeling contrast (ECC) technique in scanning electron microscopy (SEM), the dislocation patterns of the bicrystal and the matrix monocrystal were observed. It was found that the two-phase structure of persistent slip bands (PSBs) and dislocation veins can nucleate in both grains G(M) and G(E) after cyclic deformation of the bicrystal. Based on the experimental results above, the effects of the surrounding GB and the embedded grain G(E) on the cyclic stress-strain response of the bicrystal were discussed. Those results might provide an experimental evidence for understanding the difference in CSS curves between copper single- and poly-crystals. (C) 1999 Elsevier Science S.A. All rights reserved.
Keywordcopper bicrystal embedded grain grain boundary (GB) cyclic stress-strain (CSS) curve slip morphology dislocation pattern
Indexed BySCI
Language英语
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000083647800058
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:13[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/108988
Collection中国科学院金属研究所
Corresponding AuthorZhang, ZF
AffiliationChinese Acad Sci, Met Res Inst, State Key Lab Fatigue & Fracture Mat, Shenyang 110015, Peoples R China
Recommended Citation
GB/T 7714
Zhang, ZF,Wang, ZG. Cyclic deformation features of a copper bicrystal with an embedded grain and surrounding grain boundary[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,1999,271(1-2):449-457.
APA Zhang, ZF,&Wang, ZG.(1999).Cyclic deformation features of a copper bicrystal with an embedded grain and surrounding grain boundary.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,271(1-2),449-457.
MLA Zhang, ZF,et al."Cyclic deformation features of a copper bicrystal with an embedded grain and surrounding grain boundary".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 271.1-2(1999):449-457.
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