采用Gleebl于1500热模拟试验机研究γ-TiAl合金在1000～1 100℃、应变速率在0.01～1s-1的热变形特性,分析了流动应力与热力参数的关系,并建立了γ-TiAl合金在热态变形过程中峰值应力和本构方程模型.结果表明,在试验条件范围内,只有当应变速率为0.01 s-1时,才会发生完全动态再结晶;并且,温度分别为1 050和1 100℃,应变分别达到0.9和0.8时才趋于稳态流变.所建立的数学模型的计算结果与试验数据很好地吻合,从而为制定γ-TiAl合金的锻造工艺提供了理论依据.
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