401 β型チタン合金の組織制御(関東支部茨城講演会)

概要

論文の詳細を見る
With increasing population of aged people in the society, demands for artificially produced part of human body are growing rapidly. In the materials composing the artificial part, the constituent element is required not to have poisoning effect on human body cells. Also, the elastic modulus is preferred to be closer to that of human bone. A beta type titanium alloy, Ti-29Nb-13Ta-4.6Zr, with low elastic modulus has been developed for biomedical applications, and utilization is considered although higher strength is required. To obtain higher strength, aging treatment is convenient. However, in aging, alpha phase inevitably precipitates, resulting in the increase in elastic modulus. Grain refinement without alpha-phase precipitation will be the ideal solution to overcome this trade-off relationship. To reach this goal in this study, intense plastic deformation similar to what is called "Accumulative Roll-Bonding" has been applied to two beta titanium alloys, Ti-29Nb-13Ta-4.6Zr for biomedical applications and Ti-15V-3Cr-3Sn-3Al as a reference material. After the deformation, microstructure has been characterized by means of optical and transmission electron microscopies.
一般社団法人日本機械学会の論文
2005-09-08