利用Gleeble-3800热模拟实验机,在变形温度为1000～1200℃、应变速率为1～80 s-1条件下进行恒温、恒应变速率的热压缩实验,测试了高温合金Inconel 690(IN690)的真应力—应变曲线.采用加工硬化率方法,研究了Inconel 690高温合金的动态再结晶临界条件,并引入Zener-Hollomn参数建立了材料的临界应变、临界应力、峰值应变和稳态应变的模型.采用加工硬化率方法确定的动态再结晶发生的临界应变值与Sellars提出的经验模型相吻合.
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