Research Progress on Evolution Behavior and Control of β/B2 Phase in β-solidified TiAl Alloy

Author of the article:YANG Jieren

Author's Workplace：School of Materials Science and Engineering, Sichuan University

Key Words：TiAl alloy; β-solidifying; cooling; aging; phase transformation

Abstract： β/B2 phase is an important component phase in β-solidified TiAl alloy, which has a significant effect on the
mechanical properties of the alloy. The formation, decomposition and transformation of β/B2 phase are affected by many
factors, such as alloy composition, cooling process and aging parameters. Its evolution law and mechanism are complicated.
In this paper, the evolution and control of β/B2 phase and the mechanism of β/B2 phase formation, decomposition and
transformation during controlled cooling and aging in high Nb-TiAl alloy are reviewed, which can provide reference for the
fine-tuning of β-solidified TiAl alloy microstructure.