Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7209132 | Journal of the Mechanical Behavior of Biomedical Materials | 2014 | 10 Pages |
Abstract
Some newly developed β-type titanium alloys for biomedical applications exhibit distinctive heterogeneous structures. The formation mechanisms for these structures have not been completely revealed; however, understanding these mechanisms could lead to improving their properties. In this study, the heterogeneous structures of a Ti-29Nb-13Ta-4.6Zr alloy (TNTZ), which is a candidate for next-generation metallic biomaterials, were analyzed. Furthermore, the effects of such heterogeneous structures on the mechanical strength of this alloy, including fatigue strength, were revealed by comparing its strength to that of homogenous TNTZ. The heterogeneous structures were characterized micro-, submicro- and nano-scale wave-like structures. The formation mechanisms of these wave-like structures are found to be different from each other even though their morphologies are similar. It is revealed that the micro-, submicro- and nano-scale wave-like structures are caused by elemental segregation, crystal distortion related to kink band and phase separation into β and βâ², respectively. However, these structures have no significant effect on both tensile properties and fatigue strength comparison with homogeneous structure in this study.
Related Topics
Physical Sciences and Engineering
Engineering
Biomedical Engineering
Authors
Kengo Narita, Mitsuo Niinomi, Masaaki Nakai,