Phase Transformation Kinetics of High Nb-TiAl Alloy during Continuous Heating
Phase Transformation Kinetics of High Nb-TiAl Alloy during Continuous Heating
复制标题
高铌钛铝合金连续加热过程中的相变动力学
DOI:
10.1088/1742-6596/2133/1/012029
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发表时间:
2021-11
期刊:
影响因子:
--
通讯作者:
Jianxiu Liu
中科院分区:
文献类型:
--
作者:
Ying Li;Lian Zhou;Junpin Lin;Hui Chang;Jianglei Fan;Yang Cao;Yan Wang;Yongbiao Wang;Jianxiu Liu
Abstract. In this work, the phase transformation behavior of Ti-45Al-8.5Nb-(W, B, Y) alloy during continuous heating was investigated using dilatometer and optical microscopy. Results indicated that the phase transformation process of high Nb-TiAl alloy during continuous heating included two stages: ordered α2 → disorder α and tetragonal γ → hexagonal α. According to the microstructure analysis, the initial α2/γ lamellar structure transformed into the massive γ phase and α phase (retained as α2) during the heating process. The activation energy of α2 → α and γ → α was 989.65 kJ/mol and 995.30 kJ/mol, respectively. Moreover, the lower the heating rate was, the faster the phase transformation reached the equilibrium state.
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