对现有的流变应力模型进行了分析,针对BT20钛合金流变应力的特性,提出了一个新的计算热变形条件下钛合金流变应力的模型.该模型考虑了温度和应变速率的影响,能描述热变形过程中加工硬化阶段和加工软化阶段的流变应力;并建立了峰值应变、峰值应力、稳态应力和变形参量之间关系的模型.结果表明:这些模型预测结果与试验结果吻合,具有较好的精度.
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