Mg-based bulk metallic glass composites with plasticity and gigapascal strength

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	Mg-based bulk metallic glass composites with plasticity and gigapascal strength
	Y. K. Xu; H. Ma; J. Xu; E. Ma
	2005
发表期刊	Acta Materialia
ISSN	1359-6454
卷号	53 期号:6 页码:1857-1866
摘要	The lightweight Mg65Cu7.5Ni7.5Zn5Ag5Y10 bulk metallic glasses (BMG) always fail before yielding, with irreproducible strengths < 650 MPa. Adding particles of TiB2 as the reinforcing phase, which can be uniformly distributed in the matrix without adversely affecting its glass-forming ability upon copper mold casting, the BMG composites can sustain a plastic strain to failure of 2-3% at a compressive fracture strength as high as 1.3 GPa. The strengthening/toughening effects of the second phase particles are attributed to their ability to serve as obstacles to the propagation of run-away shear bands and micro-cracks, as well as to the generation of multiple shear bands due to the large elastic mismatch between the TiB2 and the matrix. The angle between the compressive shear plane and loading axis is similar to 41 degrees, consistent with the Mohr-Coulomb criterion. The very high specific strength of similar to 3.5 x 10(5) N m kg(-1) exceeds by far those of commercial Mg or Al alloys and even Zr-based BMGs. (c) 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
部门归属	cas, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. johns hopkins univ, dept mat sci & engn, baltimore, md 21218 usa.;xu, j (reprint author), cas, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china;jianxu@imr.ac.cn
关键词	Metallic Glasses Mechanical Properties Magnesium Composites Mechanical-properties Amorphous-alloys Forming Ability Zrc Particles Compressive Behavior Thermal-stability Matrix Composites Yield Criterion Fracture Flow
URL	查看原文
WOS记录号	WOS:000227572000025
引用统计	被引频次：197[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/321006/35163
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. K. Xu,H. Ma,J. Xu,et al. Mg-based bulk metallic glass composites with plasticity and gigapascal strength[J]. Acta Materialia,2005,53(6):1857-1866.
APA	Y. K. Xu,H. Ma,J. Xu,&E. Ma.(2005).Mg-based bulk metallic glass composites with plasticity and gigapascal strength.Acta Materialia,53(6),1857-1866.
MLA	Y. K. Xu,et al."Mg-based bulk metallic glass composites with plasticity and gigapascal strength".Acta Materialia 53.6(2005):1857-1866.