IMR OpenIR
DETWINNING BEHAVIOR INDUCED BY LOCAL SHEAR STRAIN IN NANOTWINNED Cu
Bai Jingsheng; Lu Qiuhong; Lu Lei
Corresponding AuthorLu Lei(llu@imr.ac.cn)
2016-04-11
Source PublicationACTA METALLURGICA SINICA
ISSN0412-1961
Volume52Issue:4Pages:491-496
AbstractNanotwinned materials have attracted widespread attention due to their superior mechanical properties, such as high strength, good ductility and work hardening. Experimental and molecular dynamics (MD) simulation results had indicated that there are three distinctly different dislocation-mediated deformation mechanisms in nanotwinned metals, namely dislocation pile-up against and slip transfer across twin boundaries (TBs), Shockley partials gliding on twin boundaries leading to twin boundary migration, and threading dislocations slip confined by neighboring twin boundaries. However, most of the previous studies are focused on the homogenous plastic deformation under tension and compression tests, the non-homogenous deformation and its deformation mechanism, especially under low strain and complex stress condition/confined condition, of nanotwinned metals are still not explored so far. In this study, the electrodeposited bulk Cu samples with preferentially oriented nanotwins were cold rolled with the normal of the rolling plane parallel to the growth direction (ND//GD) to strain of 15% at room temperature. The microstructure features of as-rolled Cu were investigated by SEM and TEM. Microstructure evolution indicates that many detwinning bands appeared in the direction about 30 degrees similar to 45 degrees with respect to the rolling direction, which is the direction with the largest shearing stress. The twin lamellae in the detwinning bands coarsened obviously. Based on calculation of the local shear strain and strain gradient of TBs in a selected detwinning band, it indicates that the maximum shear strain occurs in the middle of the deformation bands, and its detwinning mechanism is directly related the localized shear strains (gamma). The twin lamellae in the detwinning bands were coarsened obviously. When 0.3
KeywordCu nanoscale twin cold rolling detwinning shear strain
Funding OrganizationNational Basic Research Program of China ; National Natural Science Foundation of China
Indexed BySCI
Language英语
Funding ProjectNational Basic Research Program of China[2012CB932202] ; National Natural Science Foundation of China[51420105001] ; National Natural Science Foundation of China[51371171] ; National Natural Science Foundation of China[51471172]
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000374809600013
PublisherSCIENCE PRESS
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/122068
Collection中国科学院金属研究所
Corresponding AuthorLu Lei
AffiliationChinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Bai Jingsheng,Lu Qiuhong,Lu Lei. DETWINNING BEHAVIOR INDUCED BY LOCAL SHEAR STRAIN IN NANOTWINNED Cu[J]. ACTA METALLURGICA SINICA,2016,52(4):491-496.
APA Bai Jingsheng,Lu Qiuhong,&Lu Lei.(2016).DETWINNING BEHAVIOR INDUCED BY LOCAL SHEAR STRAIN IN NANOTWINNED Cu.ACTA METALLURGICA SINICA,52(4),491-496.
MLA Bai Jingsheng,et al."DETWINNING BEHAVIOR INDUCED BY LOCAL SHEAR STRAIN IN NANOTWINNED Cu".ACTA METALLURGICA SINICA 52.4(2016):491-496.
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