Cu-Cr-Zr-Y合金动态再结晶及微观组织演化  

Dynamic recrystallization behavior and microstructure evolution of Cu-Cr-Zr-Y alloy

作　　者：柴哲[1,2] 张毅[1,2] 李瑞卿[1,2] 许倩倩[1,2] 田保红[1,2] 刘勇[1,2] 刘平[3] 

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471003 [2]有色金属共性技术河南省协同创新中心,河南洛阳471003 [3]上海理工大学材料科学与工程学院,上海200093

出　　处：《功能材料》2016年第1期1102-1105,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51101052);国家高新技术研究发展计划(863计划)资助项目(2006AA03Z528);河南省高等学校青年骨干教师计划资助项目(2012GGJS-073)

摘　　要：通过在Gleeble-1500D 热模拟试验机上进行高温等温压缩试验,对Cu-0.4Cr-0.15Zr-0.04Y 合金在应变速率为0.001-10s^-1、变形温度为650-850℃、最大变形程度为50%条件下的流变应力行为进行了研究.分析了该合金在高温变形时的流变应力和应变速率及变形温度之间的关系,并研究了在热压缩过程中组织的变化.结果表明,热模拟试验中,应变速率和变形温度的变化强烈地影响合金流变应力的大小,流变应力随变形温度升高而下降,随应变速率提高而增大.从应变速率、流变应力和温度的相关性,得出了该合金高温热压缩变形时的应力指数（n）、应力参数（α）、结构因子（A ）、热变形激活能（Q ）和流变应力方程,变形温度对合金动态再结晶行为有强烈影响.The flow stress behavior of Cu-0.4Cr-0.15Zr-0.04 Yalloy during hot compression was studied by isothermal compression test at a Gleeble-1500Dthermal-mechanical simulator at the temperature from 650to850 ℃ and at the strain rate from 0.001 to 10s-1 under maximum strain of 50%.The relationship among the flow stress,strain rates and deformation temperatures was studied.The microstructure of the experimental alloy was studied in the process of hot-compression.The results show that the flow stress is controlled by both strain rate and deforming temperature,the flow stress decreases with the increase of deforming temperature,while increases with the increase of strain rate.Stress index n,stress scale parameterα,structural factor A,hot deformation activation energy Q,and constitutive equation were derived from the correlativity of flow stress,strain rate and temperature.Microstructure of the alloy strongly depends on deformation temperature.

关 键 词：Cu-0.4Cr-0.15Zr-0.04Y合金 高温压缩 动态再结晶 本构方程 

分 类 号：TG146.1[一般工业技术—材料科学与工程]