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Elastic constants of single crystal γ – TiAl

Published online by Cambridge University Press:  03 March 2011

Y. He ,
R.B. Schwarz ,
A. Migliori  and
S.H. Whang
Y. He
Affiliation:
Center for Materials Science, Los-Alamos National Laboratory, MS K765, Los Alamos, New Mexico 87545
R.B. Schwarz
Affiliation:
Center for Materials Science, Los-Alamos National Laboratory, MS K765, Los Alamos, New Mexico 87545
A. Migliori
Affiliation:
Center for Materials Science, Los-Alamos National Laboratory, MS K765, Los Alamos, New Mexico 87545
S.H. Whang
Affiliation:
Department of Materials Science and Engineering, Polytechnic University, Six Metrotech Center, Brooklyn, New York 11201
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Abstract

The six independent second-order elastic stiffness coefficients of a Ti44Al56 single crystal (L10 structure) have been measured at room temperature for the first time using a resonant ultrasonic spectroscopy (RUS) technique. These data were used to calculate the orientation dependence of Young's modulus and the shear modulus. Young's modulus is found to reach a maximum near a [111] direction, close to the normal to the most densely packed planes. The elastic moduli and Poisson's ratio for polycrystalline materials, calculated by the averaging scheme proposed by Hill, are in good agreement with experimental data and theoretical calculations.

Type
Articles
Information
Journal of Materials Research , Volume 10 , Issue 5 , May 1995 , pp. 1187 - 1195
Copyright
Copyright © Materials Research Society 1995

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