间隙碳原子对Fe_(50)Mn_(30)Co_(10)Cr_(10)熔铸态高熵合金组织与性能的影响  

Effect of Interstitial Carbon Atoms on Microstructure and Properties of Fe_(50)Mn_(30)Co_(10)Cr_(10) As-cast High-entropy Alloy

作　　者：张鹏杰 陈连生 吕煜坤 王书桓 赵定国 柳昆 ZHANG Peng-jie;CHEN Lian-sheng;LYU Yu-kun;WANG Shu-huan;ZHAO Ding-guo;LIU Kun(College of Metallurgy and Energy,North China University of Science and Technology,Tangshan 063210,China)

机构地区：[1]华北理工大学冶金与能源学院,河北唐山063210

出　　处：《稀有金属与硬质合金》2021年第5期65-70,共6页Rare Metals and Cemented Carbides

基　　金：国家自然科学基金项目(51774139);河北省自然科学基金项目(E2019209597);河北省高等学校科学技术研究项目(QN2021115)。

摘　　要：通过XRD、OM、EBSD、SEM等手段分析了不同含量的间隙碳原子对Fe_(50)Mn_(30)Co_(10)Cr_(10)熔铸态高熵合金组织与性能的影响。结果表明,随着碳含量的增加,熔铸态高熵合金相组成由FCC+HCP双相转变为FCC单相;当碳原子的摩尔分数达到4%时,基体晶界处和晶粒内析出Cr_(x)C_(y)碳化物,导致合金塑性恶化;当碳原子的摩尔分数为2%时,由于TWIP效应较明显,(Fe_(50)Mn_(30)Co_(10)Cr_(10))_(98)C_(2)高熵合金的综合力学性能最佳。The effects of different content of interstitial carbon atoms on the microstructure and properties of Fe_(50)Mn_(30)Co_(10)Cr_(10) as-cast high-entropy alloy were analyzed by means of XRD,OM,EBSD and SEM.The results show that phase composition of the as-cast alloy changes from FCC+HCP two phases to FCC single phase with the increase of carbon content.The Cr_(x)C_(y) carbide precipitates in the grain boundary and within the grains of the matrix when the molar fraction of carbon atoms reaches 4%,which deteriorates the ductility of the alloy.When the molar fraction of carbon atoms is 2%,(Fe_(50)Mn_(30)Co_(10)Cr_(10))_(98)C_(2) high-entropy alloy has the best comprehensive mechanical properties due to the obvious TWIP effect.

关 键 词：高熵合金 间隙碳原子 碳含量 TRIP效应 TWIP效应 组织 性能 

分 类 号：TG135[一般工业技术—材料科学与工程]