Microstructure and mechanical properties of slowly cooled Cu47.5Zr47.5Al5

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	Microstructure and mechanical properties of slowly cooled Cu47.5Zr47.5Al5
	Das J; Pauly S; Duhamel C; Wei BC(魏炳忱)
刊名	Journal of Materials Research
	2007
通讯作者邮箱	j.das@ifw-dresden.de
卷号	22 期号:2 页码:326-333
ISSN号	0884-2914
通讯作者	Das, J (reprint author), Tech Univ Darmstadt, FG Phys Met, FB Mat & Geowissensch 11, Petersenstr 30, D-64287 Darmstadt, Germany.
英文摘要	Cu47.5Zr47.5Al5 was prepared by arc melting and solidified in situ by suction casting into 2-5-mm-diameter rods under various cooling rates (200-2000 K/s). The microstructure was investigated along the length of the rods by electron microscopy, differential scanning calorimetry and mechanical properties were investigated under compression. The microstructure of differently prepared specimens consists of macroscopic spherical shape chemically inhomogeneous regions together with a low volume fraction of randomly distributed CuZr B2 phase embedded in a 2-7 nm size clustered "glassy-martensite" matrix. The as-cast specimens show high yield strength (1721 MPa), pronounced work-hardening behavior up to 2116 MPa and large fracture strain up to 12.1-15.1%. The fracture strain decreases with increasing casting diameter. The presence of chemical inhomogenities and nanoscale "glassy-martensite" features are beneficial for improving the inherent ductility of the metallic glass.
学科主题	力学
类目[WOS]	Materials Science, Multidisciplinary
研究领域[WOS]	Materials Science
关键词[WOS]	BULK METALLIC-GLASS ; NANOSTRUCTURE-DENDRITE COMPOSITE ; IN-SITU COMPOSITES ; HIGH-STRENGTH ; MATRIX COMPOSITES ; AMORPHOUS-ALLOYS ; ENHANCED PLASTICITY ; CASTING CONDITIONS ; FORMING ABILITY ; PHASE-FORMATION
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000244210800008
公开日期	2007-06-15
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/16225]
专题	力学研究所_力学所知识产出(1956-2008)
推荐引用方式 GB/T 7714	Das J,Pauly S,Duhamel C,et al. Microstructure and mechanical properties of slowly cooled Cu47.5Zr47.5Al5[J]. Journal of Materials Research,2007,22(2):326-333.
APA	Das J,Pauly S,Duhamel C,&魏炳忱.(2007).Microstructure and mechanical properties of slowly cooled Cu47.5Zr47.5Al5.Journal of Materials Research,22(2),326-333.
MLA	Das J,et al."Microstructure and mechanical properties of slowly cooled Cu47.5Zr47.5Al5".Journal of Materials Research 22.2(2007):326-333.