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Study of ideal strengths of metals and alloys by statistical moment method: Temperature dependence

Published online by Cambridge University Press:  31 January 2011

Vu Van Hung ,
K. Masuda-Jindo  and
Nguyen Thi Hoa
Vu Van Hung
Affiliation:
Hanoi National Pedagogic University, Hanoi, Vietnam
K. Masuda-Jindo*
Affiliation:
Department of Material Science and Engineering, Tokyo Institute of Technology, Nagasuta, Midori-ku, Yokohama 226-8503, Japan
Nguyen Thi Hoa
Affiliation:
Hanoi National Pedagogic University, Hanoi, Vietnam
*
a)Address all correspondence to this author. e-mail: kmjindo@issp.u-tokyo.ac.jp
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Abstract

The ideal strengths of metals and alloys at finite temperatures have been studied using the statistical moment method. The tensile and shear strengths of the body-centered cubic (bcc) transition metals like Mo and W (refractory metals), and ordered FeAl (B2) and Fe3Al (DO3) alloys are calculated as a function of the temperature. The orthogonal tight-binding method is used for bcc transition elements, while the universal binding-energy relation (UBER)-type of pairwise potentials, derived from ab initio density-functional theory, is used for the FeAl and Fe3Al alloys. We discuss the temperature dependence of the tensile and shear strengths of the metals and alloys in conjunction with those of the second-order elastic constants.

Keywords

Debye temperatureElastic propertiesStrength
Type
Articles
Information
Journal of Materials Research , Volume 22 , Issue 8 , August 2007 , pp. 2230 - 2240
Copyright
Copyright © Materials Research Society 2007

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References

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