Investigation on creep deformation of two high entropy alloys

摘要：

　　The current paper investigates the creep deformation of two kinds of high entropy alloys: Al0.15CoCrFeNi and Al0.6CoCrFeNi alloys by means of stress relaxation test.From metallurgical analysis, it is shown that the alloys have typical simple FCC solid solution structure for Al0.15CoCrFeNi and FCC+BCC structure for Al0.6CoCrFeNi alloy, which are similar to those of high entropy alloys.According to the relationship between stress and creep rate of the alloys, it follows Nortons power law at the temperature of 580-700 ℃.The activation energies of Al0.15CoCrFeNi and Al0.6CoCrFeNi alloys were in the range of 365-376 kJ mol-1 and 255-280 kJ mol-1, respectively.It is supposed that higher creep rate and lower activation energy attributes to the finer grain size of Al0.6CoCrFeNi alloy.

关键词： High entropy alloy Creep Activation energy Activation volume

作者: Jie Zhao Tieshan Cao Hui Wang Jian-lu Shang Cong-qian Cheng

作者单位: School of Materials Science and Engineering,Dalian University of Technology,Dalian 116085,China

会议类型: 国际会议

会议名称: 2015 International Symposium on Structural Integrity(2015年国际结构完整性学术会议)

会议地点: 沈阳

会议语种:英文

页码: 29-35

在线出版日期: 2015-05-16（万方平台首次上网日期，不代表论文的发表时间）