Improved fatigue properties with maintaining low Young's modulus achieved in biomedical beta-type titanium alloy by oxygen addition

被引:48
作者
Liu, Huihong [1 ]
Niinomi, Mitsuo [2 ,3 ,4 ,5 ]
Nakai, Masaaki [6 ]
Obara, Shinya [2 ]
Fujii, Hidetoshi [1 ]
机构
[1] Osaka Univ, Joining & Welding Res Inst, Ibaraki, Osaka 5670047, Japan
[2] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan
[3] Osaka Univ, Grad Sch Engn, Suita, Osaka 5650871, Japan
[4] Meijo Univ, Grad Sch Sci & Technol, Nagoya, Aichi 4688502, Japan
[5] Nagoya Univ, Inst Mat & Syst Sustainabil, Nagoya, Aichi 4648603, Japan
[6] Kindai Univ, Fac Sci & Engn, Dept Mech Engn, Higashiosaka, Osaka 5778502, Japan
来源
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2017年 / 704卷
关键词
Biomaterials; Titanium alloys; Characterization; Fatigue; MECHANICAL-PROPERTIES; TRANSFORMATION; BEHAVIOR; FRACTURE; TI-29NB-13TA-4.6ZR; DESIGN;
D O I
10.1016/j.msea.2017.07.078
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Oxygen was added into biomedical beta-type Ti-29Nb-13Ta-4.6Zr (mass%, TNTZ) alloy to improve its fatigue properties with maintaining its low Young's modulus. The effect of oxygen on the fatigue behaviors of these oxygen-added TNTZ alloys was systematically investigated. A series of TNTZ-(0.1, 0.3, 0.5 and 0.7 mass%)0 alloys were prepared, denoted as 0.10, 0.30, 0.50, and 0.70, respectively. The Young's moduli of the prepared alloys increase slightly with increasing oxygen content; 0.70 possessing the highest oxygen content still shows a quite low Young's modulus. The fatigue limits of the alloys increase monotonically with oxygen content increases. The high-concentration oxygen in 0.70 suppresses the slip plane decohesion and induces the formation of densely-arranged small-scaled alpha" martensite twins that increases the paths and distance for fatigue crack propagation, thus it enhances the resistance to the fatigue crack initiation and propagation in 0.70, which contributes to its excellent fatigue performance. Among all the alloys compared in the present study, 0.70 shows a high fatigue limit of similar to 635 MPa, a high tensile strength of similar to 1100 MPa, a large elongation of similar to 20% as well as a low Young's modulus of similar to 76 GPa, thus it is regarded as a promising biomaterial for next-generation biomedical applications.
引用
收藏
页码:10 / 17
页数:8
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