Elastic contants of single crystal {gamma}--TiAl

Journal Article · Mon May 01 04:00:00 EDT 1995 · Journal of Materials Research

DOI:https://doi.org/10.1557/JMR.1995.1187· OSTI ID:44513

He, Y; Schwarz, R B; Migliori, A ^[1]; Wang, S H ^[2]

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1. Center for Materials Science, Los Alamos National Laboratory, MS K765, Los Alamos, New Mexico 87545 (United States)
2. Department of Materials Science and Engineering, Polytechnic University, Six Metrotech Center, Brooklyn, New York 11201 (United States)

The six independent second-order elastic stiffness coefficients of a Ti{sub 44}Al{sub 56} single crystal ({ital L}1{sub 0} 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. The 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 the Poisson`s ratio for polycrystalline materials, calculated by the averaging scheme proposed by Hill, are in good agreement with experimental data and theoretical calculations.

• DOE Contract Number: FG02-93ER45499
• OSTI ID: 44513
• Journal Information: Journal of Materials Research, Journal Name: Journal of Materials Research Journal Issue: 5 Vol. 10; ISSN JMREEE; ISSN 0884-2914
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
ELASTICITY
MONOCRYSTALS
SHEAR PROPERTIES
SPECTROSCOPY
TEMPERATURE RANGE 0273-0400 K
TITANIUM ALLOYS
ULTRASONIC WAVES
YOUNG MODULUS