Tailoring Microstructures and Mechanical Properties of AlCoCrFeNiTi0.3 High-entropy Alloys by Heat Treatment

摘要：

　　The microstructures and mechanical properties of AlCoCrFeNi0.3 high-entropy alloys (HEAs) are tailored through heat treatment.During heat treatment,the dendrite phase with a body-centered-cubic (bcc) structure transformed into the interdendrite phase with a bcc structure.Due to the element accumulation with higher hardness in the interdendrites and the increase of volume fraction of interdendrites,the average hardness of AlCoCrFeNi0.3 HEAs increased with the heat-treatment temperature,and the highest hardness was 625 HV.After 500 ℃ heat treatment,the optimized mechanical properties under quasi-static compression were achieved,and the yielding strength and fracture plasticity were 2.30 GPa and 9 %,respectively.Upon dynamic loading,the mechanical properties of HEAs were greatly enhanced.

关键词： High-entropy alloy Heat treatment Mechanical properties Dynamic loading

作者: J.W.Qiao Y.F.Wang R.Q.Wang J.Y.Shi S.B.Sang H.J.Yang

作者单位: College of Materials Science and Engineering, Taiyuan University of Technology,Taiyuan 030024, China College of Materials Science and Engineering, Taiyuan University of Technology,Taiyuan 030024, China MicroNano System Research Center, Taiyuan University of Technology, Taiyuan 030024, China Research Institute of Surface Engineering, Taiyuan University of Technology, Taiyuan 030024,China

会议类型: 国际会议

会议名称: the Chinese Materials Congress 2012(2012年中国材料大会(CMC2012))

会议地点: 太原

会议语种:英文

页码: 768-774

在线出版日期: 2012-07-13（万方平台首次上网日期，不代表论文的发表时间）