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Enhancement of plasticity in Ti-rich Ti–Zr–Be–Cu–Ni–Ta bulk glassy alloy via introducing the structural inhomogeneity

Published online by Cambridge University Press:  31 January 2011

Jin Man Park ,
Do Hyang Kim ,
Ki Buem Kim ,
Eric Fleury ,
Min Ha Lee ,
Won Tae Kim  and
Jürgen Eckert
Jin Man Park
Affiliation:
Center for Non-Crystalline Materials, Department of Metallurgical Engineering, Yonsei University, Seoul 120-749, Korea
Do Hyang Kim*
Affiliation:
Center for Non-Crystalline Materials, Department of Metallurgical Engineering, Yonsei University, Seoul 120-749, Korea
Ki Buem Kim
Affiliation:
Department of Advanced Materials Engineering, Sejong University, Seoul 143-747, Korea
Eric Fleury
Affiliation:
Advanced Metal Research Center, Korea Institute of Science and Technology, Seoul, 130-650, Korea
Min Ha Lee
Affiliation:
Advanced Materials Division, Korea Institute of Industrial Technology, Incheon 406-840, Korea
Won Tae Kim
Affiliation:
Applied Science Division, Cheongju University, Cheongju 360-764, Korea
Jürgen Eckert
Affiliation:
Leibniz Institute for Solid State and Materials Research Dresden, Institute for Complex Materials, D-01171 Dresden, Germany; and Technische Universität (TU) Dresden, Institute of Materials Science, D-01062 Dresden, Germany
*
a)Address all correspondence to this author. e-mail: dohkim@yonsei.ac.kr
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Abstract

The effect of microstructural inhomogeneities with different length scale on the plasticity of (Ti45Zr16Be20Cu10Ni9)100–xTax (x = 0, 5, and 10) bulk glassy alloys has been studied. The formation of specific heterogeneous microstructures with a different type of structural inhomogeneity, i.e., short-/medium-range ordered clusters or micrometer-scale ductile dendrites combined with a glassy matrix, evolved by appropriately tuning the alloy chemistry, improves the room temperature plasticity up to ∼12.5% and ∼15%, respectively. The pronouncedly enhanced plasticity is mainly attributed to the retardation of shear localization and multiplication of shear bands by controlling the plastic and failure instabilities otherwise responsible for premature failure.

Keywords

AmorphousDuctilityTa
Type
Articles
Information
Journal of Materials Research , Volume 23 , Issue 11 , November 2008 , pp. 2984 - 2989
Copyright
Copyright © Materials Research Society 2008

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