| Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
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| Outline of Final Research Achievements |
To fabricate pure titanium (Ti) sintered materials with high strength and excellent ductility by using hydrogen element, which is one of the ubiquitous elements, the following processes were investigated; [1] direct use of TiH2 powder as starting materials, [2] in-process microstructures control via phase transformation by hydrogen atoms (β-phase stabilizer), [3] strengthening effect by α-Ti grains refinement and hybrid texture formation, and improvement ductility by deformation (tensile/compression) twins control using TiH2 needle-like compounds. For example, Ti-0.33 wt.%H sintered material showed a good balance between strength and ductility such as 0.2%YS of 990MPa, UTS of 1158 MPa and 23.9% elongation at room temperature.
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