title: Relationship between various deformation-induced products and mechanical properties in metastable Ti-30Zr-Mo alloys for biomedical applications.
abstract: Nowadays, there is a significant research focus on the development of bio-implant materials that have not only a low Young's modulus but also other unique characteristics such as a changeable Young's modulus and the ability to prevent calcium phosphate formation. Taking advantage of deformation-induced phases is an effective way to obtain the changeable Young's modulus. This study investigated the relationship between the various deformation-induced products and the mechanical properties-including Young's modulus, microstructure, and tensile properties-of Ti-30Zr-(5,6,7)mass%Mo alloys subjected to solution treatment (ST) and cold-rolling (CR). After ST, each alloy is composed of a β phase and a small amount of athermally formed ω phase, and exhibits a low Young's modulus. During CR, deformation-induced phase transformation occurs in all the alloys. The change in Young's modulus due to CR is highly dependent on the types of deformation-induced products. The decrease in Young's modulus due to CR is related to the deformation-induced α' phase transformation accompanying with the disappearance of athermal ω phase, and the increase in Young's modulus is attributed to the deformation-induced ω phase, which mainly exists in {332}β mechanical twins.
authors.affiliation: Department of Materials Science, Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan. zhaoxiaoli@imr.tohoku.ac.jp
authors.forename: Xiaoli
authors.initials: X
authors.lastname: Zhao
authors.forename: Mitsuo
authors.initials: M
authors.lastname: Niinomi
authors.forename: Masaaki
authors.initials: M
authors.lastname: Nakai
mesh_terms: D000497:Alloys / Q000737:chemistry*; D001672:Biocompatible Materials / Q000737:chemistry*; D055119:Elastic Modulus; D055595:Mechanical Phenomena; D008982:Molybdenum / Q000737:chemistry*; D055620:Optical Phenomena; D013718:Tensile Strength; D014025:Titanium / Q000737:chemistry*; D014961:X-Ray Diffraction; D015040:Zirconium / Q000737:chemistry*
chemical_list: D000497:Alloys; D001672:Biocompatible Materials; D008982:Molybdenum; D015040:Zirconium; D014025:Titanium