Grain refining processes and microstructure evolution of Ti-47Al-2Cr-1Nb alloy

HUANG Zhao-hui; WANG Shu-yun; LI Yuan-chun

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Journal of Aeronautical Materials ›› 2000, Vol. 20 ›› Issue (3) : 38-43.

Grain refining processes and microstructure evolution of Ti-47Al-2Cr-1Nb alloy

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Abstract

The grain refining processes by isothermal compression and heat treatment, as well as microstructure evolution of the Ti-47Al-2Cr-1Nb (at%) alloy, were investigated in this paper. The coarse lamellae of as casting TiAl alloy are broken by double isothermal compression (reduction in height above 70%) and refined after heat treatment, resulting in fine and homogeneous equiaxed γ grains. Forged microstructures indicate that dynamic recrystallization has occurred during isothermal compression and caused the flow softening.

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TiAl based alloy / isothermal forging / grain refining / microstructul

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HUANG Zhao-hui, WANG Shu-yun, LI Yuan-chun. Grain refining processes and microstructure evolution of Ti-47Al-2Cr-1Nb alloy[J]. Journal of Aeronautical Materials, 2000, 20(3): 38-43

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