利用弯曲应力松弛方法研究了具有不同显微组织的BT14合金在200,400和600℃时的应力松弛行为,分析了显微组织对合金应力松弛行为的影响.结果表明:魏氏组织在400和600℃时具有较高的抗应力松弛能力,而等轴组织在200℃具有较高的抗应力松弛能力;同时利用应力松弛方法可以得到不同显微组织BT14合金应力松弛过程中塑性应变速率和应力的本构关系,并可计算出速率应力指数和变形激活能.
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