Microstructure Evolution and Meta-Dynamic Recrystallization Behavior of Ti-45Al-8.5Nb-0.2W-0.2B-0.3Y Alloy during Inter-Pass Annealing after Deformation

Abstract:

The effect of processing parameters on meta-dynamic recrystallization (MDRX) and the microstructural characteristics evolution of TiAl alloy with high Nb containing during annealing period were studied through double-pass hot compression tests. The results indicated that the occurrence of MDRX had a strengthening effect to flow behavior of the present alloy, resulting in grain equalization. And the high temperature and large strain were beneficial for the occurrence of MDRX, resulting in the increase of recrystallization grains. For the present alloy, MDRX rate is low, hence, enough annealing time is needed for MDRX during inter-pass annealing. Besides, dislocation density is consumed with the occurrence of MDRX.

• Periodical: Materials Science Forum (Volume 1035)
• Pages: 108-113
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.1035.108
• Online since: June 2021
• Authors: Lin Xiang*, Bin Tang, Jian Quan Tao, Qiang Chen, Zhi Hui Xing, Shi Qing Gao, Ming Li, Jin Shan Li
• Keywords: Annealing, Hot Deformation, Meta-Dynamic Recrystallization, Microstructure, TiAl Alloys

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