The modeling of the deformation behavior of Cu-Al-Nb shape memory alloys containing primary particles

Issue title: E-MRS Fall Meeting 2005

Article type: Research Article

Authors: Lelatko, Józef^{a; *} | Morawiec, Henryk^a

Affiliations: [a] Institute of Materials Science, University of Silesia, Bankowa 12, 40-007 Katowice, Poland. Tel.: +48 32 359 17 10; Fax: +48 32 259 69 29; E-mail: jlelatko@us.edu.pl

Correspondence: [*] Corresponding author

Abstract: Models elaborated for the metal-matrix composite materials were modified in order to enable the control of the deformation properties of the Cu-Al-Nb type shape memory alloys containing significant number of primary particles. The modified model of the continuum mechanics approach based on the effective medium approximations and supplemented by the dislocation plasticity model enabled analysis of the deformation course of the Cu-Al-Nb alloys. By comparing the simulated and experimental stress – strain curves for these alloys, the effect of particle size, volume fraction and their elastic properties on the deformation response is given. This model allows showing that hardening of the alloy during deformation results from the presence of hard and elastic particles in the martensite matrix as well as dislocations formed at the partial accommodation of the residual stresses created during the alloy quenching.

Keywords: Cu-Al-Nb alloys, high temperature shape memory alloys, deformation, strengthening, modeling

DOI: 10.3233/JAE-2006-723

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 23, no. 1-2, pp. 133-137, 2006