钟明君,王克鲁,李鑫,周璇,冯瑞,程静

• 1:南昌航空大学航空制造工程学院

摘要(Abstract)：

采用Gleeble-3800型热模拟试验机对MoNb合金进行等温恒应变速率压缩试验,研究该合金在变形温度900～1200℃和应变速率0.01～10 s~(-1)条件下的热变形行为,计算其热变形激活能。结果表明:变形温度和应变速率对流动应力具有显著影响,流动应力随变形温度的升高和应变速率的降低而减小。误差分析表明,采用多元线性回归法建立的MoNb合金本构关系模型具有较高的精度,该模型的预测值误差小于10%的数据点占总数的92.86%,相关系数和平均相对误差分别为0.976和4.08%,能较为准确的预测合金的高温流动应力。

关键词(KeyWords)： MoNb合金;热变形行为;变形激活能;本构模型

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51464035);; 南昌航空大学研究生创新专项资金(YC2019017)

作者(Author): 钟明君,王克鲁,李鑫,周璇,冯瑞,程静

DOI: 10.13289/j.issn.1009-6264.2019-0336

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