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Achieving high strength and ductility in Fe_(50)Mn_(25)Ni_(10)Cr_(15) medium entropy alloy via Al alloying

查看全文 作　　者：Zhen [1]Jiang;Ran [1]Wei;Wenzhou [2]Wang;Mengjia [1]Li;Zhenhua [3]Han;Shuhan [1]Yuan;Kaisheng [1]Zhang;[1]ChenChen;Tan [1]Wang;Fushan [1]Li 高影响力作者 机构地区：[1]School of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,China;[2]Henan Shenhuo Coal&Power Co.Ltd,Yongcheng 476600,China;[3]School of Materials Science and Engineering,Xi’an University of Technology,Xi’an 710048,China高影响力机构 出　　处：《Journal of Materials Science & Technology》索引2022年第5期,共7页高影响力期刊 基　　金：financially supported by the National Natural Science Foundation of China(Nos.U1704159 and 51701183);the China Postdoctoral Science Foundation(No.2018M630834);supported by Center for Modern Analysis and Gene Sequencing of Zhengzhou University。 摘　　要：The microstructure and tensile properties of(Fe_(50)Mn_(25)Ni_(10)Cr_(15))_(100-x)Al_(x)(x=0-8 at.%)medium-entropy alloys(MEAs)were investigated.It was found that the crystalline structure changes from face-centered cubic(FCC)single phase to FCC+body-centered cubic(BCC)dual-phase with the increase of Al content.Therefore,the addition of Al elements with large atomic size could induce solid solution strengthening and dual-phase heterogeneous structure strengthening.Correspondingly,the present MEAs exhibit excellent combinations of yield strength,ultimate tensile strength(UTS)and ductility both at 298 and 77 K.Among the MEAs,the(Fe_(50)Mn_(25)Ni_(10)Cr_(15))_(95)Al_(5) alloy has a remarkable combination of cryogenic UTS(1077 MPa)and ductility(~85%),and has lower raw material costs than the reported high-entropy alloys(HEAs)and MEAs.The correlation among microstructure and mechanical properties and the corresponding strengthening mechanism were clarified. 关 键 词：Medium entropy alloys Microstructure Mechanical properties Cryogenic temperature
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