High strength ductile Cu-base metallic glass

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	High strength ductile Cu-base metallic glass
	J. Eckert; J. Das; K. B. Kim; F. Baier; M. B. Tang; W. H. Wang; Z. F. Zhang
	2006
发表期刊	Intermetallics
ISSN	0966-9795
卷号	14 期号:8-9 页码:876-881
摘要	Usually, bulk metallic glasses exhibit strength values superior to conventional crystalline alloys, often combined with a large elastic limit and rather low Young's modulus. This combination of properties renders such alloys quite unique when compared to commercial materials. However, the major drawback for engineering applications is their limited room temperature ductility and toughness due to the localized deformation processes linked to shear banding, where high plastic deformation is accumulated in a very narrow region without contributing to macroscopic deformation, work hardening or yielding. In this work we report on a new class of metallic glass in a simple Cu-base alloy. Addition of 5 at.% Al increases the glass-forming ability of binary Cu50Zr50. The resulting Cu47.5Zr47.5Al5 glass exhibits high strength (2265 MPa) together with large room temperature ductility up to 18%. After yielding a strong increase in the flow stress is observed during deformation. The structure of the metallic glass exhibits atomic-scale heterogeneities that enable easy nucleation and continuous multiplication of shear bands. The interaction and intersection of shear bands increases the flow stress of the material with further deformation, leading to a 'work hardening'-like behavior and yields a continuous rotation of the shear angle up to fracture resulting in a high compressive ductility. (c) 2006 Elsevier Ltd. All rights reserved.
部门归属	tech univ darmstadt, fg phys metallkunde, fb 11, d-64287 darmstadt, germany. ifw dresden, inst met werkstoffe, d-01171 dresden, germany. sejong univ, dept adv mat engn, seoul 143747, south korea. chinese acad sci, inst phys, beijing 100080, peoples r china. chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;eckert, j (reprint author), tech univ darmstadt, fg phys metallkunde, fb 11, petersenstr 23, d-64287 darmstadt, germany;j.eckert@phm.tu-darmstadt.de
关键词	Glasses Metallic Mechanical Properties At Ambient temperAture Work-hardening Microstructure Nanostructure-dendrite Composite Mechanical-properties Matrix Composites Enhanced Plasticity Thermal-stability Amorphous-alloys Zr-ti Bulk Microstructure Particles
URL	查看原文
WOS记录号	WOS:000237770600005
引用统计	被引频次：124[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/321006/34191
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. Eckert,J. Das,K. B. Kim,et al. High strength ductile Cu-base metallic glass[J]. Intermetallics,2006,14(8-9):876-881.
APA	J. Eckert.,J. Das.,K. B. Kim.,F. Baier.,M. B. Tang.,...&Z. F. Zhang.(2006).High strength ductile Cu-base metallic glass.Intermetallics,14(8-9),876-881.
MLA	J. Eckert,et al."High strength ductile Cu-base metallic glass".Intermetallics 14.8-9(2006):876-881.