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Title: Temperature and composition dependence of the elastic constants of Ni{sub 3}Al

Abstract

The stiffness constants, c{sub ij}, of monocrystalline Ni{sub 3}Al of three different compositions, 23.2, 24.0, and 25.0 at. pct Al, were measured over the temperature range from 300 to 1,100 K using the rectangular parallelepiped resonance (RPR) method. The bulk modulus, as well as the shear modulus, Young`s modulus, and Poisson`s ratio for randomly oriented polycrystalline stoichiometric Ni{sub 3}Al, were derived from the stiffness constants. The data indicate that c{sub 44} is essentially independent of composition, decreasing slightly with increasing temperature for all three alloys. The values of c{sub 11} and c{sub 12}, however, decrease with increasing aluminum content, the difference being small at room temperature but becoming larger at higher temperatures. The authors find that c{sub 11} and c{sub 12} are not as sensitive to aluminum concentration as is implied by previous results. A comparison of different shear moduli of Ni{sub 3}Al and the saturated Ni-Al solid solution in equilibrium with it indicates that the ordered phase is generally elastically stiffer than the solid solution over the range of temperatures at which coarsening of the Ni{sub 3}Al precipitate has been heavily investigated.

Authors:
; ; ; ;  [1]
  1. Univ. of California, Los Angeles, CA (United States)
Publication Date:
Sponsoring Org.:
USDOE, Washington, DC (United States); Office of Naval Research, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
OSTI Identifier:
684457
DOE Contract Number:  
FG03-96ER45573
Resource Type:
Journal Article
Journal Name:
Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science
Additional Journal Information:
Journal Volume: 30; Journal Issue: 9; Other Information: PBD: Sep 1999
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ELASTICITY; NICKEL ALLOYS; ALUMINIUM ALLOYS; INTERMETALLIC COMPOUNDS; TEMPERATURE DEPENDENCE; CHEMICAL COMPOSITION; YOUNG MODULUS; POISSON RATIO

Citation Formats

Prikhodko, S.V., Yang, H., Ardell, A.J., Carnes, J.D., and Isaak, D.G. Temperature and composition dependence of the elastic constants of Ni{sub 3}Al. United States: N. p., 1999. Web. doi:10.1007/s11661-999-0248-9.
Prikhodko, S.V., Yang, H., Ardell, A.J., Carnes, J.D., & Isaak, D.G. Temperature and composition dependence of the elastic constants of Ni{sub 3}Al. United States. doi:10.1007/s11661-999-0248-9.
Prikhodko, S.V., Yang, H., Ardell, A.J., Carnes, J.D., and Isaak, D.G. Wed . "Temperature and composition dependence of the elastic constants of Ni{sub 3}Al". United States. doi:10.1007/s11661-999-0248-9.
@article{osti_684457,
title = {Temperature and composition dependence of the elastic constants of Ni{sub 3}Al},
author = {Prikhodko, S.V. and Yang, H. and Ardell, A.J. and Carnes, J.D. and Isaak, D.G.},
abstractNote = {The stiffness constants, c{sub ij}, of monocrystalline Ni{sub 3}Al of three different compositions, 23.2, 24.0, and 25.0 at. pct Al, were measured over the temperature range from 300 to 1,100 K using the rectangular parallelepiped resonance (RPR) method. The bulk modulus, as well as the shear modulus, Young`s modulus, and Poisson`s ratio for randomly oriented polycrystalline stoichiometric Ni{sub 3}Al, were derived from the stiffness constants. The data indicate that c{sub 44} is essentially independent of composition, decreasing slightly with increasing temperature for all three alloys. The values of c{sub 11} and c{sub 12}, however, decrease with increasing aluminum content, the difference being small at room temperature but becoming larger at higher temperatures. The authors find that c{sub 11} and c{sub 12} are not as sensitive to aluminum concentration as is implied by previous results. A comparison of different shear moduli of Ni{sub 3}Al and the saturated Ni-Al solid solution in equilibrium with it indicates that the ordered phase is generally elastically stiffer than the solid solution over the range of temperatures at which coarsening of the Ni{sub 3}Al precipitate has been heavily investigated.},
doi = {10.1007/s11661-999-0248-9},
journal = {Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science},
number = 9,
volume = 30,
place = {United States},
year = {1999},
month = {9}
}