Eur. Phys. J. Special Topics 158, 93-98 (2008)
https://doi.org/10.1140/epjst/e2008-00659-1

Effect of deformation on structure and mechanical behavior of polycrystalline Ni-Mn-Ga alloys

University of Silesia, Institute of Materials Science, Bankowa 12, 40-007 Katowice, Poland

Abstract

Deformation of polycrystalline Ni-Mn-Ga alloys was studied for both the L2₁ parent phase and 10 M martensitic state. The effect of deformation by compression up to the fracture on mechanical behavior and structure change was studied for the inhomogeneous as-cast state and after annealing at 900^○C for 50 hours. The structure, after deformation of the parent phase, observed by TEM reveals the presence of 10 M and 14 M martensite in the matrix, whereas the deformation of 10 M martensite does not show the change of the structure type. The stress-strain curves were analyzed and compared with the earlier published results.