Deformation and Dynamic Recrystallization Alternately Dominate under 800 °C with Different Initial Stresses

作者：Yiyuan Chang, Shulin Dong, Yingdong Qu, Ruirun Chen, Guanglong Li, Wei Zhang · 发表于：Advanced Engineering Materials · 年份：2025 · DOI：10.1002/adem.202403063 · 被引用次数：4 · 研究领域：Intermetallics and Advanced Alloy Properties、Microstructure and mechanical properties、Microstructure and Mechanical Properties of Steels

Herein, the classical Ti‐44Al‐8Nb‐0.1B alloy is prepared by vacuum consumable melting method, and the phase transformation behavior of its metastable phase under different conditions is studied. First, the metastable phase is obtained by annealing the alloy at 1300 °C for 30 min, and then, the metastable phase alloy is annealed at 800 °C for 30 min under different initial stresses (300, 400, 500, 600, 700, and 800 MPa). SEM and EBSD tests are performed on the alloy to reveal the microstructure composition of the alloy after annealing at different initial stresses. Through further research, it is found that with the increase of initial stress, deformation and dynamic recrystallization (DRX) alternately dominate, and the reason is further explained. The reason is that under the coupling effect of heat and stress, with the increase of initial stress, the energy provided by external conditions for the alloy is also greater, which can provide more energy for the evolution of the microstructure, resulting in the process of repeated deformation and DRX. This may provide a reference for us to obtain deformation or DRX structure.