Locating bulk metallic glasses with high fracture toughness Chemical effects and composition optimization

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	Locating bulk metallic glasses with high fracture toughness Chemical effects and composition optimization
	Q. A. He; Y. Q. Cheng; E. Ma; J. A. Xu
	2011
发表期刊	Acta Materialia
ISSN	1359-6454
卷号	59 期号:1 页码:202-215
摘要	We have developed new bulk metallic glasses (BMGs) with optimized glass-forming ability (GFA), in ternary Zr-Cu-Al and quaternary Zr-Ti-Cu-Al systems The relatively large dimensions of these BMGs permitted fracture toughness tests leading to the discovery of Zr(61)T1(2)Cu(25)Al(12) (ZT1) that has a toughness among the highest for monolithic BMGs (fatigue pre-cracked fracture toughness K(max), in excess of similar to 100 MPa root m, with a nonlinear-elastic fracture behavior as seen in the resistance curve) We have also measured the toughness for Zr-TM-Al (TM = Co, Ni) BMGs, which have previously been optimized for GFA Comparing the BMGs studied, in conjunction with literature data on Zr-based BMGs we have identified trends in chemistry effects on BMG fracture toughness, in particular the role of Al as well as the effects of Cu when substituting Ni (or Co) These trends are explained in terms of not only the internal atomic packing structure, but more importantly the electronic structure and nature of bonding in light of the first-principles calculations A strategy is then outlined to locate BMG compositions with high toughness The correlations of the BMG toughness with the shear banding behavior, the Poisson's ratio (v), the product of shear modulus and molar volume (mu V(m)), and the glass transition temperature (T(g)), are also discussed (C) 2010 Acta Materialia Inc Published by Elsevier Ltd All rights reserved
部门归属	[he, qiang; xu, jian] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china. [cheng, yong-qiang; ma, evan] johns hopkins univ, dept mat sci & engn, baltimore, md 21218 usa.;xu, ja (reprint author), chinese acad sci, shenyang natl lab mat sci, inst met res, 72 wenhua rd, shenyang 110016, peoples r china
关键词	Metallic Glasses Fracture Toughness Elastic Moduli Nonlinear Elastic Fracture Zirconium Zr-cu-al Amorphous-alloys Mechanical-properties Temperature Plasticity Ductile
URL	查看原文
WOS记录号	WOS:000284789200022
引用统计	被引频次：152[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/321006/30383
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Q. A. He,Y. Q. Cheng,E. Ma,et al. Locating bulk metallic glasses with high fracture toughness Chemical effects and composition optimization[J]. Acta Materialia,2011,59(1):202-215.
APA	Q. A. He,Y. Q. Cheng,E. Ma,&J. A. Xu.(2011).Locating bulk metallic glasses with high fracture toughness Chemical effects and composition optimization.Acta Materialia,59(1),202-215.
MLA	Q. A. He,et al."Locating bulk metallic glasses with high fracture toughness Chemical effects and composition optimization".Acta Materialia 59.1(2011):202-215.