Scholarlink

The thermal compression simulation was conducted on the 60NiTi alloy manufactured via vacuum levitation melting method. And the microstructure as well as phase distribution of the ingot was investigated, the constitutive equation of the alloy was obtained based on the thermal compression data as well. The results show that the 60NiTi alloy primarily consists of a NiTi matrix, Ni3Ti phase, and Ni2Ti phase. There are significant differences in the phase structure between the center and the edge of the alloy. The Ni3Ti precipitated phase appears in a strip-like shape, the Ni2Ti phase is discontinuously strip-like, and the Ni3Ti2 phase is chunky. The overall microstructure of the 60NiTi alloy ingot prepared by vacuum levitation melting shows considerable variation, with the alloy tissue uniformity being relatively good in the region 0–70 mm from the center position. With the strain rate increasing, the peak stress of the 60NiTi alloy keeps increasing, and the constitutive equation of 60NiTi was obtained as \(\dot{\varepsilon }=9.6\times {10}^{10}{[\text{sinh}(0.00401\sigma )]}^{n}\text{exp}(-\frac{30062.18}{T})\) .

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Research on the Microstructure and Thermal Compression Behavior of 60NiTi Alloy Manufactured by Vacuum Levitation Melting

  • 会议论文

  • 发表日期：

    2025年

查看全文
  • Yi Cui,
  • Zhongjie Tian,
  • Yingli Zhao,
  • Xueliang An,
  • Yunfei Zhang

摘要

The thermal compression simulation was conducted on the 60NiTi alloy manufactured via vacuum levitation melting method. And the microstructure as well as phase distribution of the ingot was investigated, the constitutive equation of the alloy was obtained based on the thermal compression data as well. The results show that the 60NiTi alloy primarily consists of a NiTi matrix, Ni3Ti phase, and Ni2Ti phase. There are significant differences in the phase structure between the center and the edge of the alloy. The Ni3Ti precipitated phase appears in a strip-like shape, the Ni2Ti phase is discontinuously strip-like, and the Ni3Ti2 phase is chunky. The overall microstructure of the 60NiTi alloy ingot prepared by vacuum levitation melting shows considerable variation, with the alloy tissue uniformity being relatively good in the region 0–70 mm from the center position. With the strain rate increasing, the peak stress of the 60NiTi alloy keeps increasing, and the constitutive equation of 60NiTi was obtained as \(\dot{\varepsilon }=9.6\times {10}^{10}{[\text{sinh}(0.00401\sigma )]}^{n}\text{exp}(-\frac{30062.18}{T})\) .