《Table 1 Description of different heat treatments for 49.3 Ti-Ni (at%) wires samples used for proper

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《利用BaZrO_3坩埚制备钛镍形状记忆合金组织及性能的研究（英文）》

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In this experiment，the melting process in the vacuum induction furnace was operated using the 25 kg-grade home-made BaZrO3 crucible under the atmosphere of argon gas with a purity of 99.99%.The furnace was purged with Ar gas three times after the vacuum degree was evacuated to less than 5×10-2 Pa by a diffusion pump.In the melting period，the temperature was increased gradually.The refining temperature was controlled at about 1450°C for 3 min after the alloy was completely melted.Finally，the melt was poured into a graphite mould which was preheated and placed in the furnace，and the TiNi ingot with a mass of13.5 kg was shaped.After the melting and casting，the samples extracted from the core of alloy ingot were used for chemical analysis，and the alloy ingot was processed into a wire form（Ф1.0 mm）by homogenizing annealing，forging，rolling and drawing subsequently.Wire samples for property test were collected after different heat treatments as given in Table 1.To compare the fatigue and shape memory properties of samples melted by BaZrO3 and graphite crucibles，the identical chemical constitution，processing parameters and heat treatments with Qi’s work[24]were carried out in this work.