Transactions of Materials and Heat Treatment

Title：Thermoplastic deformation behavior of Ti4822 TiAl alloy

Authors： Zhu Chuanzhi1 Wang Xiaozhuo2 Fan Kaibin1 Liu Ning1 Li Yabing1 Liu Yi1 Chen Qiang1

Unit： 1. AECC Aviation Power Co. Ltd. Xi′an 710021 China 2. Naval Equipment Department Xi′an 710000 China

KeyWords： Ti4822 TiAl alloy deformation temperature strain rate flow softening dynamic recrystallization

ClassificationCode：TG142.1

year,vol(issue):pagenumber：2025,50(6):241-248

Abstract：

The isothermal plastic deformation of Ti4822 TiAl alloy was studied by a hot compression simulation device under the conditions of the hot deformation temperature of 1000-1200 ℃, the strain rate of 0.001-0.1 s-1, and the compression deformation amount of 30% and 60%. Then, based on the experimental data, the hot processing map of Prasad instability criterion for Ti4822 TiAl alloy was constructed, and the mechanism for the influence of different hot deformation temperatures on the dynamic recrystallization evolution law of material under the deformation amounts of 30% and 60% was discussed in detail. The results indicate that when the deformation amount of Ti4822 TiAl alloy is 30%, the suitable processing temperature is 1120-1175 ℃ and the strain rate is 0.001 s-1, as well as the suitable processing temperature is 1150-1180 ℃ and the strain rate is 0.1 s-1. When the deformation amount of Ti4822 TiAl alloy is 60%, the suitable processing temperature is 1145-1160 ℃ and the strain rate is 0.1 s-1. Thus, the influence of hot deformation temperature on the flow softening degree of Ti4822 TiAl alloy is more obvious, and its influence on the dynamic recrystallization of Ti4822 TiAl alloy is greater than that of strain rate.

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作者简介：朱传志（1991-），男，博士，高级工程师，E-mail：whdd1991@163.com

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