Bulk metallic glasses with large plasticity: Composition design from the structural perspective

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	Bulk metallic glasses with large plasticity: Composition design from the structural perspective
	L. Zhang; Y. Q. Cheng; A. J. Cao; J. Xu; E. Ma
	2009
发表期刊	Acta Materialia
ISSN	1359-6454
卷号	57 期号:4 页码:1154-1164
摘要	While most bulk metallic glasses (BMGs) appear brittle at room temperature, appreciable compressive plastic strains have been observed for some glass compositions. The origin of this behavior is not understood. and the compositions of such plastic BMGs remain difficult to predict. Here we explain the plasticity observed in a Zr-Cu(Ni)-Al BMG, based on a computational analysis of the composition-dependent internal Structures that influence shear transformations and shear localization behavior under loading. A strategy is then proposed to design BMG compositions with the desired local order for significant compressive plasticity. and is demonstrated by the successful discovery of an Hf(62)Ni(25)Al(13) BMG capable of sustaining large compressive strains. The experimentally measured compressive strength, glass transition temperature and Poisson's ratio, which are all composition dependent, are also shown to be macroscopic indicators that correlate well with the predictions from the atomic level structure. (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights, reserved.
部门归属	[zhang, ll; xu, jian] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [cheng, yong-qiang; cao, a-jing; ma, evan] johns hopkins univ, dept mat sci & engn, baltimore, md 21218 usa.;xu, j (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china;jianxu@imr.ac.cn ema@jhu.edu
关键词	Amorphous Materials Metallic Glasses Mechanical Properties Plastic Deformation Structure Atomic Packing Compression Flow Deformation Brittleness Dynamics Strain Alloy Order
URL	查看原文
WOS记录号	WOS:000264248700020
引用统计	被引频次：114[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/32553
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	L. Zhang,Y. Q. Cheng,A. J. Cao,et al. Bulk metallic glasses with large plasticity: Composition design from the structural perspective[J]. Acta Materialia,2009,57(4):1154-1164.
APA	L. Zhang,Y. Q. Cheng,A. J. Cao,J. Xu,&E. Ma.(2009).Bulk metallic glasses with large plasticity: Composition design from the structural perspective.Acta Materialia,57(4),1154-1164.
MLA	L. Zhang,et al."Bulk metallic glasses with large plasticity: Composition design from the structural perspective".Acta Materialia 57.4(2009):1154-1164.