Effect of Laser Energy Density on Microstructures and Properties of Additively Manufactured AlCoCrFeNi_(2.1)Eutectic High-Entropy Alloy  

作　　者：Lingxiao Du Hang Ding Yun Xie Li Ji Wanbin Chen Yunze Xu 

机构地区：[1]School of Materials Science and Engineering,Nanchang Hangkong University,Nanchang 330063,China [2]School of Naval Architecture and Ocean Engineering,Dalian University of Technology,Dalian 116024,China

出　　处：《Acta Metallurgica Sinica(English Letters)》2025年第2期233-244,共12页金属学报(英文版)

基　　金：supported by the Jiangxi Provincial Key Research and Development Program(No.20232BBE50007);the Jiangxi Provincial Natural Science Foundation(No.20224BAB214018).

摘　　要：In the present study,AlCoCrFeNi_(2.1)eutectic high-entropy alloy(EHEA)has been fabricated by laser melting deposition(LMD).The influence of laser energy density on microstructures,wear resistance and corrosion resistance of the alloy was systematically explored.The results indicate that the AlCoCrFeNi_(2.1)EHEA exhibited lamellar eutectic microstructures with alternating FCC and BCC phases.With the increase in laser energy density,the alloy grain size,interlamellar spacing,and volume fraction of the FCC phase increased,while the hardness of the alloy decreased.Meanwhile,the tribological performance of the alloy deteriorated with increasing laser energy density,and the combined effects of abrasive wear and adhesive wear gradually became significant.In addition,increasing laser energy density from 18.2 to 25 J/mm^(2)resulted in the increase in corrosion current density of the AlCoCrFeNi_(2.1)EHEA from 6.36.10−8 to 3.02.10−7 A/cm^(2)and the negative shift of corrosion potential from−211 to−292 mV(SCE).In summary,reducing laser energy density improved the wear and corrosion performance of the additively manufactured AlCoCrFeNi_(2.1)EHEA.

关 键 词：Additive manufacturing AlCoCrFeNi_(2.1)eutectic high-entropy alloy Wear resistance Corrosion resistance 

分 类 号：TG1[金属学及工艺—金属学]