硼含量对FeCoNiCrAl_(0.1)B_(x)高熵合金组织和力学性能的作用  

Effects of boron content on microstructure and mechanical properties of FeCoNiCrAl_(0.1)B_(x) high-entropy alloy

作　　者：谢亚茜 陈业新[1] 马星星 XIE Yaxi;CHEN Yexin;MA Xingxing(Institute of Materials,Shanghai University,Shanghai 200072,China)

机构地区：[1]上海大学材料研究所,上海200072

出　　处：《上海大学学报（自然科学版）》2021年第2期280-288,共9页Journal of Shanghai University:Natural Science Edition

基　　金：国家自然科学基金资助项目(51271102)。

摘　　要：研究了硼含量对FeCoNiCrAl_(0.1)B_(x)(x=0~0.1)高熵合金微观组织和力学性能的作用.结果表明:当硼含量x≤0.03时,FeCoNiCrAl_(0.1)B_(x)高熵合金由单一面心立方(facecentered cubic,FCC)结构的γ相组成;而当硼含量x≥ 0.05 时,FeCoNiCrAl_(0.1)B_(x)高熵合金由γ相、微量的有序态FCC相和硼化物组成.硼元素的加入,细化了 FeCoNiCrAl_(0.1)B_(x)高熵合金的晶粒,提高了合金的抗拉强度,但也降低了合金的延伸率.在真空中拉伸时,FeCoNiCrAl_(0.1)B_(x)高熵合金的断口形貌均为韧窝状塑性断口.The effects of boron content on the microstructure and mechanical properties of FeCoNiCrAl_(0.1)B_(x)(x=0~0.1) high-entropy alloy were investigated in this study.The results suggested that the FeCoNiCrAl_(0.1)B_(x) high-entropy alloy consisted of single facecentered cubic(FCC) γ phases when x≤0.03,whereas it consisted of FCC γ phase,trace of ordered FCC phase,and boride when x≥0.05.With the addition of boron atoms in the alloy,the grain size of the alloy refined,tensile strength of the alloy increased,and elongation of the alloy decreased with an increase in the boron content.The fractographs of the FeCoNiCrAl_(0.1)B_(x) high-entropy alloy exhibited all transgranular fracture patterns during tensile testing in vacuum.

关 键 词：FeCoNiCrAl_(0.1)B_(x)高熵合金 硼含量 力学性能 

分 类 号：TG135[一般工业技术—材料科学与工程]