%0 journal article
%@ 0003-6951
%A Li, Z.,Zhang, Y.,Esling, C.,Gan, W.,Zou, N.,Zhao, X.,Zuo, L.

%D 2014
%J Applied Physics Letters
%N 2
%P 021907 
%R doi:10.1063/1.4890598
%T In-situ neutron diffraction study of martensitic variant redistribution in polycrystalline Ni-Mn-Ga alloy under cyclic thermo-mechanical treatment
%U https://doi.org/10.1063/1.4890598
2 
%X The influences of uniaxial compressive stress on martensitic transformation were studied on a polycrystalline Ni-Mn-Ga bulk alloy prepared by directional solidification. Based upon the integrated in-situ neutron diffraction measurements, direct experimental evidence was obtained on the variant redistribution of seven-layered modulated (7M) martensite, triggered by external uniaxial compression during martensitic transformation. Large anisotropic lattice strain, induced by the cyclic thermo-mechanical treatment, has led to the microstructure modification by forming martensitic variants with a strong ⟨0 1 0⟩7M preferential orientation along the loading axis. As a result, the saturation of magnetization became easier to be reached.