AlCoCrCuFeNi_x高熵合金的压缩性能及断口分析  

Compressive Behavior and Fracture Observation of AlCoCrCuFeNi_x High Entropy Alloy

作　　者：王春伟[1] 唐健江[1] 欧子义[1] 苏广才[1] 欧德群[1] 夏薇[1] 

机构地区：[1]广西大学有色金属及材料加工新技术教育部重点试验室

出　　处：《特种铸造及有色合金》2011年第3期201-203,189,共3页Special Casting & Nonferrous Alloys

基　　金：广西大学有色金属及材料加工新技术教育部重点实验室开放基金资助项目(GXKFJ09-05)

摘　　要：对AlCoCrCuFeNix高熵合金的压缩性能进行测试,然后再利用SEM分析其断裂情况。结果表明,合金的屈服强度和抗压强度都是一个由低到高再到低的变化过程,其中AlCoCrCuFeNi的综合性能最佳。随着Ni含量增加,压缩断口由解理断裂演化到准解理断裂,然后再到延性断裂,合金亦由脆性材料逐渐转变成塑性材料。Compression behavior and fracture morphology of AlCoCrCuFeNix high entropy alloy were investigated by compressive testing and SEM (scanning electron microscope) observation. The results show that both yield strength and compression strength of the alloy are firstly increased and then decreased, and AlCoCrCuFeNi alloy exhibits desirable comprehensive performance. With increasing in Ni content, fracture morphology is evolved from cleavage fracture to quasi-cleavage one and then to ductile one, meanwhile, the alloy is transformed from brittle into ductile ones.

关 键 词：高熵合金 压缩性能 断口 

分 类 号：TG115.5[金属学及工艺—物理冶金]