Effect of chemical ordering annealing on superelasticity of Ni–Mn–Ga–Fe ferromagnetic shape memory alloy microwires

Liu Yanfen^{1, †}, Zhang Xuexi², Shen Hongxian², Sun Jianfei², Li Qinan¹, Liu Xiaohua¹, Li Jianjun¹, Cheng Weidong¹

SEM micrographs of the grains and fracture surfaces of the Ni₅₀Mn₂₅Ga₂₀Fe₅ microwires: (a), (b) the as-extracted microwires, and (c), (d) the annealed microwires.