Development of pseudo bone implant by additive manufacturing using mixture powders

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K05141
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 26040:Structural materials and functional materials-related
• Research Institution: Niihama National College of Technology
• Principal Investigator: Todai Mitsuharu 新居浜工業高等専門学校, 環境材料工学科, 准教授 (10610800)
• Co-Investigator(Kenkyū-buntansha): 真中 俊明 新居浜工業高等専門学校, 環境材料工学科, 准教授 (60805068)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: 金属３Dプリンタ / レーザ積層造形法 / 生体材料 / チタン合金

Outline of Final Research Achievements

The fabrication the Ti-Cr alloys from a mixture of pure elemental powders was achieved using selective laser melting process(SLM). The Ti-Cr alloys comprise β-Ti single-phase without any non-molten particles and macroscopic defects. The crystallographic texture of these βphase in Ti-Cr alloys can be controlled effectively by optimizing the process parameters. The growth of {001}〈100〉crystallographic orientation during the SLM process is discussed based on the solidification process focusing on the columnar cell growth in the melt pool. These results imply the possibility of fabricating the Ti-based alloys with well-developed crystallographic texture from the mixture of pure elemental powders using the process of SLM. These results will greatly contribute to the future development of the additive manufacturing process.

Free Research Field

金属材料学

Academic Significance and Societal Importance of the Research Achievements

本研究の目的遂行は、ターゲットとしているβ-Ti合金のみならず、様々な合金系へと波及することが予想され、例えば造形機に粉末混合機を搭載させることで、ボタン1つで自在に合金系・組成・形状・組織を制御し、製品を作ることのできるプロセスの構築につながると考えられる。このことは言うまでもなく、今後の積層造形法を用いた製造プロセスの一層の普及に直結し、金属３Ｄプリンタを用いた製造技術発展とこれに関する市場拡大に大きく寄与するといえる。