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Grain size effect on deformation twinning and detwinning
Zhu YT; Liao XZ; Wu XL(武晓雷); Narayan J; Zhu, YT (reprint author), N Carolina State Univ, Dept Mat Sci & Engn, Box 7907, Raleigh, NC 27695 USA.
Source PublicationJOURNAL OF MATERIALS SCIENCE
2013-07
Volume48Issue:13Pages:4467-4475
ISSN0022-2461
AbstractThis article systematically overviews the grain size effect on deformation twinning and detwinning in face-centered cubic (fcc) metals. With decreasing grain size, coarse-grained fcc metals become more difficult to deform by twinning, whereas nanocrystalline (nc) fcc metals first become easier to deform by twinning and then become more difficult, exhibiting an optimum grain size for twinning. The transition in twinning behavior from coarse-grained to nc fcc metals is caused by the change in deformation mechanisms. An analytical model based on observed deformation physics in nc metals, i.e., grain boundary emission of dislocations, provides an explanation of the observed optimum grain size for twinning in nc fcc metals. The detwinning process is caused by the interaction between dislocations and twin boundaries. Under a certain deformation condition, there exists a grain size range where the twinning process dominates over the detwinning process to produce the highest density of twins.
KeywordDeformation Mechanism Deformation Twinning Detwinning Grain Size Grain Size Effect Grain Boundaries Fcc Metals Coarse-grained Nanocrystallines Optimum Grain-size Twin Boundaries
Subject Area损伤、破坏机理和微结构演化
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000317367200003
Funding OrganizationNational Science Foundation of the United States [DMR-1104667]; Australian Research Council [DP120100510]; National Science Foundation of China [11072243, 11021262, MOST 2010CB631004]
DepartmentLNM材料介观力学性能的表征
Classification二类/Q1
Citation statistics
Cited Times:52[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/47229
Collection非线性力学国家重点实验室
Corresponding AuthorZhu, YT (reprint author), N Carolina State Univ, Dept Mat Sci & Engn, Box 7907, Raleigh, NC 27695 USA.
Recommended Citation
GB/T 7714
Zhu YT,Liao XZ,Wu XL,et al. Grain size effect on deformation twinning and detwinning[J]. JOURNAL OF MATERIALS SCIENCE,2013,48(13):4467-4475.
APA Zhu YT,Liao XZ,Wu XL,Narayan J,&Zhu, YT .(2013).Grain size effect on deformation twinning and detwinning.JOURNAL OF MATERIALS SCIENCE,48(13),4467-4475.
MLA Zhu YT,et al."Grain size effect on deformation twinning and detwinning".JOURNAL OF MATERIALS SCIENCE 48.13(2013):4467-4475.
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