在 Ti-Al-Nb 三元系热力学数据库基础上,运用相图计算技术预测了 Ti2AlNb 基合金 Ti-22Al-27Nb 的相比例和相组成等平衡相结构信息,并揭示了该合金相结构的演化过程,与实验结果吻合较好.随着温度的变化,该合金中存在的平衡相也随之变化:在 1050℃以上全部转变为 B2相,在 1000～1500℃之间α2+B2 两相共存,在 843～1000℃之间为α2+B2+O1 三相共存,在 750～843℃之间为α2+B2+O2 三相共存,在 727～750℃之间为 O2+B2 两相共存,在 727℃以下全部转变为O2相.
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