Laser directed energy deposited, ultrafine-grained functional titanium-copper alloys tailored for marine environments: Antibacterial and anti-microbial corrosion studies

作     者：Jiaqi Li Duyao Zhang Xiaobo Chen Dake Xu Dong Qiu Fuhui Wang Mark Easton Jiaqi Li;Duyao Zhang;Xiaobo Chen;Dake Xu;Dong Qiu;Fuhui Wang;Mark Easton

作者机构：Shenyang National Laboratory for Materials ScienceNortheastern UniversityShenyang 110819China Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education)School of Materials Science and EngineeringNortheastern UniversityShenyang 110819China School of EngineeringCentre for Additive ManufacturingRMIT UniversityMelbourneVIC 3000Australia 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2023年第166卷第35期

页      面：21-33页

核心收录：

学科分类：0806[工学-冶金工程] 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）] 0802[工学-机械工程] 080201[工学-机械制造及其自动化] 

基　　金：This work was financially supported by the National Natural Science Foundation of China(No.U2006219) the National Key Re-search and Development Program of China(No.2020YFA0907300) the Fundamental Research Funds for the Central Universities of the Ministry of Education of China(Nos.N2102009 and N2002019) the Liaoning Revitalization Talents Program(No.XLYC1907158).The authors acknowledge the facilities,and the scientific and techni-cal assistance of the RMIT Digital Manufacturing Facility(DMF)and the RMIT Microscopy&Microanalysis Facility(RMMF).D.Z.would like to thank the support of ARC-DECRA grant(No.DE210101503) D.Q.and M.E.appreciate the financial support of ARC Discovery grant(No.DP220101501) 

主　　题：Multifunctional titanium alloys Additive manufacturing Ultrafine grains Microbiologically influenced corrosion resistance Mechanical property Antibacterial property 

摘      要：The microorganism-rich nature of the ocean imposes great challenges to the structural integrity of met-als over their service lifespan,including titanium(Ti)alloys,which are usually prone to microbiologically influenced corrosion(MIC).So,multifunctional anti-MIC Ti alloys need to be developed and *** paper investigates the effect of copper(Cu)concentration on the MIC resistance of a series of additively manufactured,ultrafine-grained Ti-x Cu(x=3.5,6.5 and 8.5 in wt.%)*** dependence of the cor-rosion resistance and MIC resistance on the Cu concentration of Ti-Cu alloy is interpreted considering all conceivable *** mechanisms for excellent corrosion resistance of Ti-Cu alloy in seawater are attributed to the strong passive film and small surface potential difference between ***-tural characterization reveals that uniformly distributed,nanosized Ti_(2) Cu phase led to increased reactive oxygen species in the bacterial membrane,which is the root reason for the superb anti-bacterial property(99.2%)for *** to pure Ti and Ti-6Al-4V,Ti-8.5Cu alloy features both high strength(yield stress1000 MPa)and the best MIC resistance(97.5%).The combination of such balanced properties enables this functional 3D printed Ti-Cu alloy to become an ideal material for load-bearing applications in the marine environment.