Abstract In this work, two TiNiV alloys with nominal compositions of Ti46Ni44V10 and Ti37Ni38V25 were prepared by casting. Thin wires were acquired by cold drawing. The microstructure, transformation characteristics and mechanical properties of the wires were investigated. The microstructure analysis showed that β-V phase was stretched into nanowires after drawing. The results suggested that the R → B19′ transformation increases with increasing annealing temperature. The tension test showed that after 400 °C annealing, the two alloys exhibited superior superelastic. Both of the alloys exhibit high transformation critical stress and large hysteresis. The Ti46Ni44V10 alloy exhibited critical transformation stress of about 575 MPa and reversible strain of about 7% in 8% superelastic cycle. The Ti37Ni38V25 alloy exhibits critical transformation stress of about 1100 MPa and reversible strain of about 6% when annealed at 400 °C. Ti37Ni38V25 alloy exhibited high absorbed energy of about 54 MJ/m3 in 8% superelastic cycle, which is about 3 times higher than that in the NiTi alloy.

中文翻译：

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V纳米线增强大滞后TiNi基体形状记忆合金的相变和超弹性特性

摘要 在这项工作中，通过铸造制备了两种名义成分为Ti46Ni44V10 和Ti37Ni38V25 的TiNiV 合金。通过冷拉获得细线。研究了线材的显微组织、相变特性和力学性能。微观结构分析表明，β-V 相在拉拔后被拉伸成纳米线。结果表明，随着退火温度的升高，R→B19'转变增加。拉伸试验表明，400℃退火后，两种合金均表现出优异的超弹性。这两种合金都表现出高转变临界应力和大滞后。Ti46Ni44V10合金在8%的超弹性循环中表现出约575 MPa的临界转变应力和约7%的可逆应变。Ti37Ni38V25 合金在 400 °C 退火时表现出约 1100 MPa 的临界转变应力和约 6% 的可逆应变。Ti37Ni38V25 合金在 8% 的超弹性循环中表现出约 54 MJ/m3 的高吸收能量，比 NiTi 合金高约 3 倍。