Phase equilibria among α (hcp), β (bcc) and γ (Ll0) phases in Ti-Al base ternary alloys
Phase equilibria among α (hcp), β (bcc) and γ (Ll0) phases in Ti-Al base ternary alloys
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DOI：
10.1016/s0966-9795(00)00015-7
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发表时间：
2000-08-01
期刊：
影响因子：
4.4
通讯作者：
Ishida, K
中科院分区：
文献类型：
--
作者：
Kainuma, R;Fujita, Y;Ishida, K
在 1000-1300 摄氏度的温度范围内研究了 Ti-Al 基三元体系中 α(A3)、α(2) (D0(19))、β(A2 或 B2) 和 γ(L1(0)) 相之间的相平衡。使用多相合金通过电子探针微分析确定联络线和相界。已确定除Zr之外的几乎所有元素都倾向于分配为β相而不是分配为α、α(2)或γ相，而Zr主要分配为γ相。在1000℃时，在α(2)相和γ相之间的平衡状态下，V、Cr、Mo、Ta和W分配到at相而不是γ相，而Mn、Fe、Co、Ni、Cu和Zr倾向于富集到γ相中。合金元素的分配系数仅略微依赖于它们的浓度。基于这些数据，讨论了合金元素对 α、α(2)、β 和 γ 相的相对稳定作用。 (C) 2000 Elsevier Science Ltd. 保留所有权利。
Phase equilibria between the alpha(A3), alpha(2) (D0(19)), beta(A2 or B2) and the gamma(L1(0)) phases in the Ti-Al base ternary systems were investigated over the temperature range 1000-1300 degrees C. The tie lines and the phase boundaries were determined by electron probe microanalysis using multiphase alloys. It was established that almost all the elements except Zr tended to partition into the beta phase rather than into the alpha, alpha(2) or the gamma phase, while Zr mostly partitioned into the gamma phase. At 1000 degrees C, in the equilibrium state between the alpha(2) and the gamma phases, V, Cr, Mo, Ta and W partitioned to the at phase rather than to the gamma phase, whereas Mn, Fe, Co, Ni, Cu and Zr tended to concentrate Into the gamma phase. The partition coefficients for the alloying elements were only slightly dependent on their concentration. Based on these data, the relative stabilizing effects of alloying elements on the alpha, alpha(2), beta and gamma phases are discussed. (C) 2000 Elsevier Science Ltd. All rights reserved.