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Deformation Behavior of Ti–Zr–Ni–Cu–Be Metallic Glass and Composite in the Supercooled Liquid Region

Published online by Cambridge University Press:  03 March 2011

D.H. Bae*
Affiliation:
Department of Metallurgical Engineering, Yonsei University, Seoul 120-749, Korea
J.M. Park
Affiliation:
Department of Metallurgical Engineering, Yonsei University, Seoul 120-749, Korea
J.H. Na
Affiliation:
Department of Metallurgical Engineering, Yonsei University, Seoul 120-749, Korea
D.H. Kim
Affiliation:
Department of Metallurgical Engineering, Yonsei University, Seoul 120-749, Korea
Y.C. Kim
Affiliation:
Division of Materials Science and Engineering, Korea Institute of Science and Technology, Seoul 130-136, Korea
J.K. Lee
Affiliation:
Advanced Material Technology R&D Center, Korea Institute of Industrial Techonology, Cheonansi 330-825, Korea
*
a)Address all correspondence to this author. e-mail: donghyun@yonsei.ac.kr
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Abstract

The deformation behavior of Ti-based bulk metallic glass (BMG) and metallic glass matrix composite (MGMC), both having a multistep crystallization behavior upon heating, has been investigated in the supercooled liquid region. The BMG deforms homogeneously and exhibits moderate elongation to failure due to its multistep crystallization behavior, but shows a significant variation of the flow stress during deformation. For the MGMC containing an in situ β-phase, a stress-overshoot characteristic, observed in the BMG, is not presented, but elongation to failure is rather limited because the crystalline β-phase prevents the viscous flow of the amorphous phase. The different presence of the crystalline phases in the metallic glasses can differently affect the flow behavior of metallic glass in the supercooled liquid region.

Type
Articles
Copyright
Copyright © Materials Research Society 2004

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References

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