| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2017: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
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| Outline of Final Research Achievements |
Hydrogen containing titanium (TiH2) powder were employed via spark plasma sintering and hot extrusion process in solid-state. TiH2 material was effective for a significant improvement of 0.2% yield strength and ultimate tensile strength. The formation of <0001> α / <10 - 10> α texture of the extruded TiH2 material in the β to α phase transformation was fabricated during the cooling process. The phase transformation contributed to enhance the mechanical strength of hydrogen containing Ti materials. Based on these results, we focused on iron which is an impurity component of commercial titanium, also a β phase stabilizing element. Iron containing pure titanium material was also showed high strength by formation of <0001> α texture by hot plastic working with phase transformation as well as hydrogen containing. The materials design for the texture control and high strength powder metallurgy pure titanium materials containing β phase stabilizing element was established.
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