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Strong crystal size effect on deformation twinning

文献类型:期刊论文

作者Yu, Qian1; Shan, Zhi-Wei1,2; Sun, Jun1; Ma, Evan1; Li, Ju1,5; Huang, Xiaoxu3; Xiao, Lin4
刊名NATURE
出版日期2010
卷号463期号:7679页码:335-338
关键词AL SINGLE-CRYSTALS MATERIALS SCIENCE METALS TITANIUM STRENGTH BEHAVIOR NUCLEATION PLASTICITY DEPENDENCE MAXIMUM
ISSN号0028-0836
通讯作者Sun, Jun
英文摘要

Deformation twinning(1-6) in crystals is a highly coherent inelastic shearing process that controls the mechanical behaviour of many materials, but its origin and spatio-temporal features are shrouded in mystery. Using micro-compression and in situ nano-compression experiments, here we find that the stress required for deformation twinning increases drastically with decreasing sample size of a titanium alloy single crystal(7,8), until the sample size is reduced to one micrometre, below which the deformation twinning is entirely replaced by less correlated, ordinary dislocation plasticity. Accompanying the transition in deformation mechanism, the maximum flow stress of the submicrometre-sized pillars was observed to saturate at a value close to titanium's ideal strength(9,10). We develop a 'stimulated slip' model to explain the strong size dependence of deformation twinning. The sample size in transition is relatively large and easily accessible in experiments, making our understanding of size dependence(11-17) relevant for applications.

语种英语
WOS记录号WOS:000273748100039
源URL[http://ir.imde.ac.cn/handle/131551/10900]  
专题成都山地灾害与环境研究所_内部资料
作者单位1.Xi An Jiao Tong Univ, CAMP Nano, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China
2.Hysitron Inc, Minneapolis, MN 55344 USA
3.Univ Penn, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA
4.Tech Univ Denmark, Riso Natl Lab Sustainable Energy, Mat Res Div, Danish Chinese Ctr Nanomet, DK-4000 Roskilde, Denmark
5.Johns Hopkins Univ, Dept Mat Sci & Engn, Baltimore, MD 21218 USA
推荐引用方式
GB/T 7714
Yu, Qian,Shan, Zhi-Wei,Sun, Jun,et al. Strong crystal size effect on deformation twinning[J]. NATURE,2010,463(7679):335-338.
APA Yu, Qian.,Shan, Zhi-Wei.,Sun, Jun.,Ma, Evan.,Li, Ju.,...&Xiao, Lin.(2010).Strong crystal size effect on deformation twinning.NATURE,463(7679),335-338.
MLA Yu, Qian,et al."Strong crystal size effect on deformation twinning".NATURE 463.7679(2010):335-338.

入库方式: OAI收割

来源:成都山地灾害与环境研究所

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