S0402-2-3 粉末冶金法を用いた酸化チタン分散強化型チタン材料の強度特性評価([S0402-2]粉末成形とその評価(2))

概要

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Titanium has very excellent material properties, but it is difficult to use more commonly because of its expensive material cost and poor formability. In particular, titanium alloys have high tensile strength of 900 to 1200MPa and light weight of 4.43g/cm^3. On the other hand, its material and processing cost becomes highly expensive because of its poor plasticity, low machinability and special alloying process. In this study, high-purity (HP) titanium with good elongation was employed as start material, and titanium dioxide (TiO_2) particles were dispersed in titanium matrix as a cost effective strengthening particle to improve the poor strength of HP titanium. For instance, HP titanium material with 1.5mass% TiO_2 particles exhibits 900MPa of 0.2% yield strength (YS), 1040MPa of ultimate tensile strength (UTS) and 25% of elongation. It has a excellent elongation and comparable tensile properties with above titanium alloys.
2010-09-04