Influence of casting temperature on microstructures and mechanical properties of Cu50Zr45.5Ti2.5Y2 metallic glass prepared using copper mold casting

Zhu, Z. W. and Zhang, H. F. and Wang, Hao and Ding, B. Z. and Hu, Z. Q. and Huang, Han (2009) Influence of casting temperature on microstructures and mechanical properties of Cu50Zr45.5Ti2.5Y2 metallic glass prepared using copper mold casting. Journal of Materials Research, 24 (10). pp. 3108-3115. ISSN 0884-2914

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Abstract

We investigated the influence of casting temperatures on microstructures and mechanical properties of rapidly solidified Cu50Zr45.5Ti2.5Y2 alloy. With casting temperatures increasing, the content of the crystalline phase decreases. At high casting temperature, i.e., 1723 K, glass forming ability (GFA) of the present alloy enhanced. It is implied that adjusting casting temperatures could be used for designing the microstructures of bulk metallic glass matrix composite (BMGC). Nano-indentation tests indicated that CuZr phases is a little softer and can accommodate more plastic deformation than the amorphous matrix. Compression tests confirmed that this kind of the second phase (CuZr) precipitated under lower casting temperatures helps to initiate multiple shear bands, resulting in great improvement of mechanical properties of the samples. Our work indicate that casting temperatures lead a great influence on GFA, microstructures and mechanical properties of rapidly solidified alloy and controlling casting temperatures is crucial to the application of BMGs.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Deposited in accordance with the copyright policy of the publisher.
Depositing User: Dr Hao Wang
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Mechanical and Mechatronic Engineering
Date Deposited: 23 Oct 2011 06:23
Last Modified: 02 Jul 2013 23:55
Uncontrolled Keywords: amorphous matrices; bulk metallic glass matrix composite; casting temperatures; compression tests; copper mould casting; crystalline phase; glass-forming ability; microstructures and mechanical properties; nanoindentation tests; rapidly solidified; second phase
Fields of Research (FOR2008): 09 Engineering > 0912 Materials Engineering > 091206 Glass
09 Engineering > 0912 Materials Engineering > 091207 Metals and Alloy Materials
10 Technology > 1007 Nanotechnology > 100799 Nanotechnology not elsewhere classified
Socio-Economic Objective (SEO2008): B Economic Development > 86 Manufacturing > 8612 Fabricated Metal Products > 861203 Metal Castings
Identification Number or DOI: doi: 10.1557/jmr.2009.0373
URI: http://eprints.usq.edu.au/id/eprint/8203

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