硼添加对Al0.1CoCrFeNi高熵合金压缩性能的影响  

Effect of Boron-doping on Compression Properties of Al0.1CoCrFeNi High Entropy Alloy

作　　者：杨静 马胜国[1,2,3] 赵聃 吴桂英[1,2,3] YANG Jing;MA Shengguo;ZHAO Dan;WU Guiying(Institute of Applied Mechanics,Taiyuan University of Technology,Taiyuan 030024,China;Shanxi Key Laboratory of Material Strength and Structural Impact,College of Mechanical and Vehicle Engineering,Taiyuan University of Technology,Taiyuan 030024,China;National Demonstration Center for Experimental Mechanics Education,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学应用力学研究所,山西太原030024 [2]太原理工大学机械与运载工程学院材料强度与结构冲击山西省重点实验室,山西太原030024 [3]太原理工大学力学国家级实验教学示范中心,山西太原030024

出　　处：《热加工工艺》2020年第6期70-72,76,共4页Hot Working Technology

基　　金：国家自然科学基金项目(51501123,11602158);山西省“1331工程”重点创新团队基金项目(2018)。

摘　　要：采用真空电弧熔炼炉制备Al0.1CoCrFeNiBx(x为摩尔分数,x=0,0.1,0.3)高熵合金,通过X射线衍射分析、光学电镜和扫描电镜观察以及压缩性能的测试,分析了少量硼加入对Al0.1CoCrFeNi高熵合金微观组织和压缩性能的影响。结果表明,少量硼加入使单相的Al0.1CoCrFeNi高熵合金析出了第二相,显著地提高了Al0.1CoCrFeNi的压缩强度,而压缩塑性没有下降。当加入摩尔分数为0.1的硼后,合金屈服强度增加了1.2倍;而加入摩尔分数为0.3的硼后,合金屈服强度增加了4.3倍。Al0.1CoCrFeNiBx(x is mole fraction,x=0,0.1,0.3)high entropy alloys(HEAs)were prepared by vacuum arc-melting furnace.XRD,OM,SEM and compression tests are conducted to investigate the effects of small amount of boron-doping on the microstructure and mechanical behavior of Al0.1CoCrFeNi HEA.The results show that small amount of boron-doping makes the second phase of the single-phase Al0.1CoCrFeNi high-entropy alloy precipitate,which significantly improve the compression strength of Al0.1CoCrFeNi HEA without sacrificing the compression plasticity.The yielding strength of boron-doped alloys with a mole fraction of 0.1 is increased by 1.2 times,while the boron content is 0.3,it is increased by 4.3 times.

关 键 词：高熵合金 硼添加 微观组织 压缩性能 析出强化 

分 类 号：TG146.1[一般工业技术—材料科学与工程]