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.
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