High strength ductile Cu-base metallic glass

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	High strength ductile Cu-base metallic glass
	Eckert, J ; Das, J ; Kim, KB ; Baier, F ; Tang, MB ; Wang, WH ; Zhang, ZF
刊名	INTERMETALLICS
	2006
卷号	14 期号:8-9 页码:876
关键词	NANOSTRUCTURE-DENDRITE COMPOSITE MECHANICAL-PROPERTIES MATRIX COMPOSITES ENHANCED PLASTICITY THERMAL-STABILITY AMORPHOUS-ALLOYS ZR-TI BULK MICROSTRUCTURE PARTICLES
ISSN号	0966-9795
通讯作者	Eckert, J: Tech Univ Darmstadt, FG Phys Metallkunde, FB 11, Petersenstr 23, D-64287 Darmstadt, Germany.
中文摘要	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.
收录类别	SCI
语种	英语
公开日期	2013-09-17
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/39255]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Eckert, J,Das, J,Kim, KB,et al. High strength ductile Cu-base metallic glass[J]. INTERMETALLICS,2006,14(8-9):876.
APA	Eckert, J.,Das, J.,Kim, KB.,Baier, F.,Tang, MB.,...&Zhang, ZF.(2006).High strength ductile Cu-base metallic glass.INTERMETALLICS,14(8-9),876.
MLA	Eckert, J,et al."High strength ductile Cu-base metallic glass".INTERMETALLICS 14.8-9(2006):876.