通过连续升温热膨胀法分析Ti55531 (Ti-5Mo-5Cr-5V-3Al-1Zr)合金在连续升温过程中的热膨胀行为、物相组成和显微组织,绘制热膨胀微分曲线.结果发现:随着升温速率的增加,相变温度逐渐升高.其中,在1℃/min的升温速率下不同温度区间内的相变行为如下:低于192℃时,发生ωath→β转变;192～347℃时,发生β→ωiso转变;347～376℃时,发生ωiso→αβ+、β→α转变;409～648℃时,发生β→α转变;648～831℃时,发生α→β转变;831℃时,转变为全β组织.计算得到α→β转变热激活能为188.04kJ/mol.
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