Grain growth behavior of Ti-22Al-27Nb alloy

doi:10.13251/j.issn.0254-6051.2021.08.008

Abstract

Abstract: Grain growth behavior of the Ti-22Al-27Nb alloy under different isothermal annealing temperatures and time was studied through measuring and calculating the grain size of the alloy. The results show that the grain size of the alloy increases with the increase of isothermal annealing temperature and time, while the grain growth rate decreases with the increase of isothermal annealing time. The grain growth index is 0.38 and 0.44 when the isothermal annealing temperature is 1070 ℃ and 1090 ℃ respectively. The grain growth activation energy of the Ti-22Al-27Nb alloy increases with the increase of isothermal annealing time, in the range of 132.8-267.2 kJ·mol^-1.

Key words: Ti-22Al-27Nb alloy, grain growth, growth index, activation energy

CLC Number:

TG166.5

Qin Chun, Li Ning, Dong Fuyuan, Li Yongquan. Grain growth behavior of Ti-22Al-27Nb alloy[J]. Heat Treatment of Metals, 2021, 46(8): 42-45.

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