Effect of Carburization on the Mechanical Properties of Biomedical Grade Titanium Alloys

被引:30
作者
Luo, Yong [1 ]
Jiang, Haibo [2 ]
Cheng, Gang [1 ]
Liu, Hongtao [1 ]
机构
[1] China Univ Min & Technol, Inst Tribol & Reliabil Engn, Sch Mat Sci & Engn, Xuzhou 221116, Peoples R China
[2] Xuzhou Normal Univ, Mech & Elect Engn Inst, Xuzhou 221116, Peoples R China
基金
中国国家自然科学基金;
关键词
titanium alloys; hardness; surfaces; ceramics; sequential carburization; SURFACE MODIFICATION; ION-IMPLANTATION; TI-6AL-4V ALLOY; TI6AL4V ALLOY; COATINGS; WEAR; OXIDATION; GRAPHITE; CARBIDE;
D O I
10.1016/S1672-6529(11)60004-8
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Titanium cermets were successfully synthesized on the surface of biomedical grade titanium alloys by using sequential carburization method. The mechanical properties such as hardness, fracture toughness and plasticity were measured to estimate the potential application of titanium cermets. The results show that after carburization the surface hardness of titanium cermets was 778 HV, with a significant improvement of 128% compared with that of titanium alloys. In addition, the fracture toughness of titanium cermets was 21.5x10(6) Pa.m(1/2), much higher than that of other ceramics. Furthermore, the analysis of the loading-unloading curve in the nanoindentation test also indicates that the plasticity of titanium cermet reached 32.1%, a relatively high value which illustrates the combination of the metal and ceramics properties. The results suggest that sequential carburization should be an efficient way to produce titanium cermets with hard surface, high toughness and plasticity.
引用
收藏
页码:86 / 89
页数:4
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