Deformation and fracture behaviors of Co-based metallic glass and its composite with dendrites

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	Deformation and fracture behaviors of Co-based metallic glass and its composite with dendrites
	J. T. Fan ; Z. F. Zhang ; S. X. Mao ; B. L. Shen ; A. Inoue
刊名	Intermetallics
	2009
卷号	17 期号:6 页码:445-452
关键词	Glasses metallic Composite based on the metallic glass matrix intermetallics miscellaneous Deformation map Fracture toughness Mechanical properties at ambient temperature mechanical-properties plastic-deformation amorphous-alloys transition ductile damage brittleness zones
ISSN号	0966-9795
中文摘要	Microstructures and mechanical properties of Co-based metallic glass with nominal composition of Co(43)Fe(20)Ta(5.5)B(31.5) (at.%) cast at the different cooling rates were investigated. When cooling rate is low enough, some dendritic crystalline phases were in situ precipitated from the glass matrix, forming the Co-based metallic glass composite with dendrites. Macroscopically, the fully amorphous samples often split apart or were broken into some particles, displaying a fragmentation failure mode. The size of particles became larger with the decrease in cooling rate. But, strength reduces slightly. Besides, the composites with dendrites show a small compressive plasticity, plus local melting behaviors with vein-like structure on the fracture surfaces. Furthermore, the effects of cooling rate on microstructures, deformation and fracture behaviors were discussed systemically. It is proposed that the fragmentation mechanism can be attributed to the inherent brittle character and high stress concentrations around the free volume. And the local melting behavior is due to the more receiving elastic energy and local shearing. (C) 2008 Elsevier Ltd. All rights reserved.
原文出处	://WOS:000265474200011
公开日期	2012-04-13
内容类型	期刊论文
源URL	[http://210.72.142.130/handle/321006/31883]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	J. T. Fan,Z. F. Zhang,S. X. Mao,et al. Deformation and fracture behaviors of Co-based metallic glass and its composite with dendrites[J]. Intermetallics,2009,17(6):445-452.
APA	J. T. Fan,Z. F. Zhang,S. X. Mao,B. L. Shen,&A. Inoue.(2009).Deformation and fracture behaviors of Co-based metallic glass and its composite with dendrites.Intermetallics,17(6),445-452.
MLA	J. T. Fan,et al."Deformation and fracture behaviors of Co-based metallic glass and its composite with dendrites".Intermetallics 17.6(2009):445-452.