刘建军,王克鲁,鲁世强,李鑫,程静

• 1:南昌航空大学航空制造工程学院

摘要(Abstract)：

采用热模拟设备对Ti-Nb合金进行压缩实验,研究了其在应变速率为0.001～10 s~(-1)和变形温度为790～940℃时的热变形行为,并建立了基于应变耦合的Z参数修正的Arrhenius本构模型,同时获得了应变速率、变形温度与稳态应力之间的规律。结果表明:合金的流变应力会随着变形温度的下降和应变速率的上升而增加;所建立的本构模型具有非常高的精确度。通过计算,所建的本构模型在790℃≤T≤850℃时R值为0.9833,误差在10%以内的数据点占总数的95%,平均误差4.98%,最大误差13.7%;在850℃

关键词(KeyWords)： Ti-Nb合金;热变形行为;本构模型;应变耦合

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51464035)

作者(Author): 刘建军,王克鲁,鲁世强,李鑫,程静

DOI: 10.13289/j.issn.1009-6264.2019-0003

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