New Deformation Twinning Mechanism Generates Zero Macroscopic Strain In Nanocrystalline Metals

doi:10.1103/PhysRevLett.100.095701

IMECH-IR > 力学所知识产出(1956-2008)

	New Deformation Twinning Mechanism Generates Zero Macroscopic Strain In Nanocrystalline Metals
	Wu XL(武晓雷); Liao XZ; Srinivasan SG; Zhou F; Lavernia EJ; Valiev RZ; Zhu YT; Srinivasan, SG (reprint author), Los Alamos Natl Lab, Mat Sci & Technol Div, POB 1663, Los Alamos, NM 87544 USA.
发表期刊	Physical Review Letters
	2008
ISSN	0031-9007
摘要	Macroscopic strain was hitherto considered a necessary corollary of deformation twinning in coarse-grained metals. Recently, twinning has been found to be a preeminent deformation mechanism in nanocrystalline face-centered-cubic (fcc) metals with medium-to-high stacking fault energies. Here we report a surprising discovery that the vast majority of deformation twins in nanocrystalline Al, Ni, and Cu, contrary to popular belief, yield zero net macroscopic strain. We propose a new twinning mechanism, random activation of partials, to explain this unusual phenomenon. The random activation of partials mechanism appears to be the most plausible mechanism and may be unique to nanocrystalline fcc metals with implications for their deformation behavior and mechanical properties.
关键词	Molecular-dynamics Simulation Aluminum Twins Crystals
DOI	10.1103/PhysRevLett.100.095701
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000253764500046
关键词[WOS]	MOLECULAR-DYNAMICS SIMULATION ; ALUMINUM ; TWINS ; CRYSTALS
WOS研究方向	Physics
WOS类目	Physics, Multidisciplinary
引用统计	被引频次：167[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/26116
专题	力学所知识产出(1956-2008)
通讯作者	Srinivasan, SG (reprint author), Los Alamos Natl Lab, Mat Sci & Technol Div, POB 1663, Los Alamos, NM 87544 USA.
推荐引用方式 GB/T 7714	Wu XL,Liao XZ,Srinivasan SG,et al. New Deformation Twinning Mechanism Generates Zero Macroscopic Strain In Nanocrystalline Metals[J]. Physical Review Letters,2008.
APA	武晓雷.,Liao XZ.,Srinivasan SG.,Zhou F.,Lavernia EJ.,...&Srinivasan, SG .(2008).New Deformation Twinning Mechanism Generates Zero Macroscopic Strain In Nanocrystalline Metals.Physical Review Letters.
MLA	武晓雷,et al."New Deformation Twinning Mechanism Generates Zero Macroscopic Strain In Nanocrystalline Metals".Physical Review Letters (2008).

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