摘要
通过等温恒应变速率压缩试验研究了热加工条件下热力参数对Ti60合金高温变形行为的影响。结果表明:随着温度的升高和应变速率的降低,Ti60合金流动应力显著减小,表现为较强的应变速率敏感性和温度敏感性。以幂函数型Arrhenius方程为基础,引入Z-H参数的多项式建立了Ti60合金的本构关系。误差分析结果表明,流动应力计算值与试验值之间的相对误差小于10%,所建立的本构关系能够比较精确地描述Ti60合金热加工过程中的流动行为。
The effects of thermomechanical parameters on the flow stress of Ti60 alloy were investigated based on the results of the isothermal constant strain rate compression tests. The results show that the flow stress of Ti60 alloy reduces with the increasement of temperature and deereasement of strain rate, which presents strong strain rate sensitivity and temperature sensitivity. The constitutive equation of Ti60 alloy was obtained on power function equation and Z-H parameter. The results of error analysis show the relative error between the calculated and experimental flow stress is less than 10%. The constitutive equation can describe the flow behavior of Ti60 alloy during hot-working exactly.
出处
《航空材料学报》
EI
CAS
CSCD
北大核心
2012年第3期40-45,共6页
Journal of Aeronautical Materials
关键词
Ti60合金
本构关系
高温变形行为
热模拟
Ti60 alloy
constitutive equation
high temperature deformation behavior
thermal simulation
