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Influence of additional elements on the development of nanoscale heterogeneities in (TiCu)-based bulk metallic glasses with enhanced ductility

Published online by Cambridge University Press:  31 January 2011

X.F. Zhang ,
K.B. Kim ,
J. Das ,
S. Yi  and
J. Eckert
X.F. Zhang
Affiliation:
Department of Materials Science and Metallurgy, Kyungpook National University, Buk-gu, Daegu 702-701, Korea
K.B. Kim
Affiliation:
Department of Advanced Materials Engineering, Sejong University, Gwangjin-gu, Seoul 143-747, Korea
J. Das
Affiliation:
IFW Dresden, Institute for Complex Materials, D-01069 Dresden, Germany
S. Yi*
Affiliation:
Department of Materials Science and Metallurgy, Kyungpook National University, Buk-gu, Daegu 702-701, Korea
J. Eckert
Affiliation:
IFW Dresden, Institute for Complex Materials, D-01069 Dresden, Germany
*
a)Address all correspondence to this author. e-mail: yish@knu.ac.kr
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Abstract

The effect of additional elements on microstructure and mechanical properties of (TiCu)-based bulk metallic glasses (BMGs) has been systematically investigated. Based on the values of the heat of mixing between the additional elements and the major constituent elements Ti and Cu, small additions of elements having a positive heat of mixing with Cu and a negative heat of mixing with Ti are effective in forming nanoscale heterogeneities upon solidification and enhance the ductility. It is experimentally demonstrated that the selection of the minor elements in (TiCu)-based BMGs plays a crucial role to induce nanoscale heterogeneities and thus to control the deformation behavior of the bulk metallic glasses.

Keywords

AmorphousMicrostructureNanostructure
Type
Articles
Information
Journal of Materials Research , Volume 22 , Issue 8 , August 2007 , pp. 2223 - 2229
Copyright
Copyright © Materials Research Society 2007

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