利用金相法测定了Ti_(50)Al_(48)M_2(M=Ti,V,Cr,Mn,Zr,Ga,Cu和Nb)中α?α+7相变温度以及不同温度固溶处理后初生γ相和层状区的体积百?含量,还根据透射电镜照片测定了部分Ti_(50)Al_(48)M_2合金中层状区内α_2相层片和γ相层片的厚度,用电子探针测定了合金元素Al,Cr,Mn和Nb在不同相中的分布这些结果可为合理选择合金化元素和热处理温度提供参考
The phasse transformation temperature of α→α+γ and the volume fractions ofprimary γ-phase and lamellar zone after solution treatment at different temperatures were de-termined for Ti_(50)Al_(48)M_2(M=Ti, V, Cr, Mn, Zr, Ga, Cu and Nb) alloys. The thickness of γand α_2 lamellae in lamellar zone of some Ti_(50)Al_(48)M_2 alloys and the concentration of Al, Cr,Mn, Nb in α and γ_p phases were measured statistically. These results seem to be available toselect reasonably the third alloying element and heat treatment regime of TiAl base alloy.
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