Studies on high efficiency sintering of Ti-6Al-4V powder

2023 Fiscal Year Final Research Report

• Project/Area Number: 20K04168
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 18010:Mechanics of materials and materials-related
• Research Institution: Setsunan University
• Principal Investigator: IKEDA Shushi 摂南大学, 理工学部, 教授 (50845724)
• Co-Investigator(Kenkyū-buntansha): 三宅 修吾 神戸市立工業高等専門学校, その他部局等, 教授 (60743953)
• Project Period (FY): 2020-04-01 – 2024-03-31
• Keywords: チタン合金 / 純アルミニウム / 粉末 / 圧粉成形 / 焼結

Outline of Final Research Achievements

A process that can produce forging materials by adding pure aluminum powder to a titanium alloy powder base in air in a short time was examined, and then the microstructure and the effects of both elements were investigated. The binder effect of aluminum improves the relative density and enables compacting at room temperature. When this compact is sintered at high temperature, grain growth can be controlled by the intermetallics between titanium and aluminum. These results indicate a possibility to produce high-quality forged materials.

Free Research Field

材料工学

Academic Significance and Societal Importance of the Research Achievements

本研究では「高温加熱時の結晶粒成長をいかにして抑制・防止するか」に関して、「純アルミニウム粉末の添加により金属間化合物を生成させ、チタン合金粉末の合体と結晶粒成長を抑制可能」との学術的成果を得た。さらに、真空中で3時間程度かけていたHIP処理を省略可能な大気中での短時間熱処理を見出だしたことにより低コスト、低CO2排出量で適用部品を拡大できる社会的意義がある。