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Optimization of mechanical and antibacterial properties of Ti-3wt%Cu alloy through cold rolling and annealing

Rare Metals 2022年第2期41卷 610-620页

作者： Hai-Lin Yang Meng-Zhen Zhu Jian-Ying Wang Chen-Xu Ma Xiong-Wen Zhou Hai-Xia Xing Er-Lin Zhang Shou-Xun Ji State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China Department of Prosthodontics Centre of StomatologyXiangya HospitalCentral South UniversityChangsha 410008China Department of General Dentistry Peking University School and Hospital of StomatologyBeijing 100081China Key Laboratory for Anisotropy and Texture of Materials School of Materials Science and EngineeringEducation Ministry of ChinaNortheastern UniversityShenyang 110819China Brunel Centre for Advanced Solidification Technology(BCAST) Brunel University LondonUxbridge UB83PHUK

In this work,a process of cold rolling with 70%thickness reduction and different annealing temperatures was selected to regulate the microstructure of Ti-3wt%Cu *** evolution,mechanical properties and antibacterial properties of the Ti-3wt%Cu alloy under different conditions were systematically investigated in terms of X-ray diffraction(XRD),scanning electron microscope(SEM),transmission electron microscope(TEM),tensile and antibacterial *** results indicated that cold rolling could dramatically increase the ultimate tensile stress(UTS)from 520 to 928 MPa,but reduce the fracture strain from 15.3%to 3.8%.With the annealing temperature increasing from 400 to 800C for 1 h,the UTS decreased from 744 to 506 MPa and the fracture strain increased from12.7%to 24.4%.Moreover,the antibacterial properties of the Ti-3wt%Cu alloy under different conditions showed excellent antibacterial rate(>96.69%).The results also indicated that the excellent combination of strength and ductility of the Ti-3wt%Cu alloy with cold rolling and following annealing could be achieved in a trade-off by tuning the size and distribution of Ti2Cu phase,which could increase the applicability of the alloy in clinical *** importantly,the antibacterial properties maintained a good stability for the Ti-3wt%Cu alloy under different *** excellent combination of mechanical properties and antibacterial properties could make the Ti-3wt%Cu alloy a good candidate for long-term orthopaedic implant application.

关键词： Titanium alloys Mechanical properties Antibacterial property Microstructure Plastic deformation orthopaedic implant application

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