张文,李来平,程军,胡忠武,高选乔,赵彬,张平祥.Mo-Nb单晶的热变形行为及本构方程[J].稀有金属材料与工程,2018,47(1):207~213.[ZhangWen,Li Laiping,Cheng Jun,Hu Zhongwu,Gao Xuanqiao,Zhao Bin,Zhang Pingxiang.Hot Deformation Behavior and Constitutive Equation of Mo-Nb Single Crystals[J].Rare Metal Materials and Engineering,2018,47(1):207~213.]
Mo-Nb单晶的热变形行为及本构方程
投稿时间:2017-04-26  修订日期:2017-09-15
中文关键词:  Mo-Nb单晶  本构方程  热压缩
基金项目:
中文摘要:
      Gleeble-3800热模拟试验机对Mo-Nb单晶材料的高温流变应力变化规律进行了热模拟实验研究,变形温度区间为1100~1350℃、应变速率为0.001~10s-1、变形程度为50%,真应变量为0.7。结果表明,变形温度和变形速率对Mo-Nb单晶材料的流变应力对有较大影响,Mo-Nb单晶材料的真应力-真应变曲线表现出峰值、应变软化和稳态流动等特征。采用修正Arrhenius双曲正弦函数建立了Q、A、n、α等材料常数与真应变的函数关系式,计算了在试验条件下的各种材料参数,推导了Mo-Nb单晶材料高温变形本构方程。
Hot Deformation Behavior and Constitutive Equation of Mo-Nb Single Crystals
英文关键词:Mo-Nb single crystals  Constitutive equation  Hot compression
英文摘要:
      Isothermal compression of the Mo-Nb single crystals was conducted on a Gleeble-3800 thermal simulator at the deformation temperature range of 1100-1300℃with strain rates ranging from 0.001 to 10s-1 and height reduction of 50%, true strain is 0.7. The results show that the deformation temperature and strain rates affected the flow stress during the thermal deformation of Mo-Nb single crystals significantly. The true stree-strain curves exhibit a peak flow stress, flow softening and steady flow behavior. The constents of Mo-Nb single crystals, such as the activation energy Q, the stress exponent n, are calculated. The constitutive equation is estabilished based on a hyperbolic-sine equations of Arrhenius type.
作者单位E-mail
张文 西北工业大学 gwenzh@163.com 
李来平 西北有色金属研究院  
程军 西北有色金属研究院  
胡忠武 西北有色金属研究院  
高选乔 西北有色金属研究院  
赵彬 西北工业大学  
张平祥 西北工业大学  
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