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Stress-induced martensitic transformations in CuZrAl bulk metallic glass forming alloys

Sun, Y. F. and Shek, C. H. and Li, F. S. and Guan, S. K. (2008) Stress-induced martensitic transformations in CuZrAl bulk metallic glass forming alloys. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 479 (1-2). pp. 31-36.

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Official URL: http://www.sciencedirect.com/science?_ob=ArticleUR...

Abstract

In this paper, 5 rum diameter Cu46.5Zr48.5Al5 bulk metallic glass forming alloys were prepared by water cooled Cu-mould cast. Microstructural observation shows that the alloys consist of amorphous phase and crystalline phase containing CuZr martensite. The deformation behaviors of the crystalline region and amorphous phase in the alloys were studied by means of nanoindentation tests under progressive multicycle mode. The results reveal that the unloading and the subsequent reloading h-p curves for the amorphous phase can retrace each other. While for the crystalline region, an obvious hysteresis loop was found between the unloading and reloading h-p curves in the typically elastic regime, indicating the occurrence of `stress-induced phase transformation'. This unique deformation behavior of the material was also confirmed by using uniaxial compression tests. (c) 2007 Elsevier B.V. All rights reserved.

Item Type:Article
Uncontrolled Keywords:bulk metallic glass; phase transformation; deformation; composites
Subjects:Material Science > Functional and hybrid materials
ID Code:6081
Deposited By:IoN
Deposited On:03 Sep 2009 17:03
Last Modified:03 Sep 2009 17:03

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