摘要
通过高温等温压缩试验,对Cu-Cr-Zr-Ti合金在700~900℃,应变速率0. 01~10 s-1的条件下高温热变形行为进行了研究。结果表明:合金的流变应力随温度的升高而减小,随应变速率的升高而增加。根据动态材料模型绘制了合金的热加工图,得到合金的最佳热加工参数为:温度900℃,应变速率0. 01 s-1。同时使用Johson-Mehl方程计算动态再结晶的体积分数,与EBSD测定的试验结果相近,表明Johson-Mehl方程在Cu-Cr-Zr-Ti合金中也具有适用性。
High temperature hot deformation behavior of Cu-Cr-Zr-Ti alloy at 700-900℃and strain rate between 0.01-10 s-1 was studied by means of high temperature isothermal compression test.The results show that the flow stress decreases with increasing temperature and increases with increasing strain rate.According to the dynamic material model,the processing map of the alloy is drawn.The optimum thermal processing parameters of the alloy are suggested as follows:temperature at 900℃and strain rate with 0.01 s-1.At the same time,the Johson-Mehl equation was used to calculate the volume fraction of dynamic recrystallization,which is similar to the experimental results of EBSD determination,indicating that the Johson-Mehl equation also has applicability in Cu-Cr-Zr-Ti alloy.
作者
蔡薇
高鹏哲
陈辉明
谢伟滨
汪航
Cai Wei;Gao Pengzhe;Chen Huiming;Xie Weibin;Wang Hang(School of Materials Science and Engineering,Jiangxi University of Science and Technology,Ganzhou Jiangxi 341000,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2019年第8期147-154,共8页
Heat Treatment of Metals
基金
江西理工大学优秀博士学位论文培育计划(YB2017009)
关键词
Cu-Cr-Zr-Ti合金
高温热变形
本构方程
热加工图
Cu-Cr-Zr-Ti alloy
high temperature hot deformation
flow stress constitutive equation
hot processing map
