A novel Co-free high-entropy alloy with excellent antimicrobial and mechanical properties

作     者：Wen-Yu Li Ming-Liang Wang Xiao-Di Wang Tong-Min Wang Ting-Ju Li Yi-Ping Lu Wen-Yu Li;Ming-Liang Wang;Xiao-Di Wang;Tong-Min Wang;Ting-Ju Li;Yi-Ping Lu

作者机构：Key Laboratory of Solidification Control and Digital Preparation Technology(Liaoning Province)School of Materials Science and EngineeringDalian University of TechnologyDalian 116024China 

出 版 物：《Rare Metals》 (稀有金属(英文版))

年 卷 期：2025年第44卷第1期

页      面：581-590页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：国家科技攻关计划项目 Liaoning Revitalization Talents Program 

主　　题：High-entropy alloy Microstructure Antibacterial property Mechanical property 

摘      要：Microbiologically influenced corrosion and bacterial infection lead to serious losses to human production and *** alloys with inherent antibacterial properties is a vital way to solve the above ***,the widely used Cu-containing stainless steels show insufficient antimicrobial properties and relatively low yield strengths,which further limit their application in extreme service *** on the design concept of high-entropy alloys(HEAs),a novel low-cost Co-free CrFeNi_(0.5)Cu_(0.3)HEA with an optimal combination of antibacterial and mechanical properties was designed and *** alloy comprises triple-phase structures,including FeNi-rich face-centered cubic(FCC1),Cu-rich FCC2 and FeCr-rich body-centered cubic(BCC).The antibacterial rate of this HEA is up to 99.99%against Escherichia coli,which is far superior to that of classic 304 Cu-bearing stainless steel(304-Cu SS)and the most reported antibacterial *** addition,the HEA exhibits excellent mechanical properties with a tensile strength of 1032 MPa and yield strength of 842 MPa,far surpassing the corresponding values of 304-Cu SS(i.e.,528 MPa and 210 MPa,respectively).These findings provide new insights for the development of low-cost and high-performance antibacterial alloys.