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Title: Effect of chi-phase precipitation on elastic modulus of Cu-Al-Ni-(Ti)-(Mn) shape memory alloys
Authors: Hurtado, Iñaki ×
Van Humbeeck, Jan
Ratchev, Petar
Delaey, Lucas #
Issue Date: Jul-1996
Publisher: Japan Institute of Metals
Series Title: Materials Transactions, JIM vol:37 issue:7 pages:1371-1378
Abstract: Cu-Al-Ni shape memory alloys present a minimum in their elastic modulus during the martensitic transformation, and the values in both the martensite and high temperature beta-phase, follow the same trend. The addition of Ti, as grain refiner, produces chi-phase precipitates which substantially modify the elastic modulus profile of the alloy. The elastic modulus values of both martensite and beta-phase increase to a different level, and no minimum during the transformation is observed. The specific changes in the elastic modulus depend upon the size distribution of the chi-phase precipitates, which, in turn, is a function of the thermomechanical history of the material. In the present article, a dislocation string model is used to qualitatively explain the elastic modulus profiles, making use of the coherency degree of the precipitates.
ISSN: 0916-1821
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Physical Metallurgy and Materials Engineering Section (-)
Mechanical Metallurgy Section (-)
× corresponding author
# (joint) last author

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