Electron beam additive manufacturing of Ti-6Al-4V alloy using plasma rotating electrode process powder

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K14619
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 18020:Manufacturing and production engineering-related
• Research Institution: Tohoku University
• Principal Investigator: CUI YUJIE 東北大学, 金属材料研究所, 助教 (30796214)
• Project Period (FY): 2020-04-01 – 2022-03-31
• Keywords: Additive manufacturing / Ti alloy

Outline of Final Research Achievements

Ti-6Al-4V alloy powder with high sphericity, fewer satellites and fewer pores was obtained by plasma rotating electrode process (PREP). Controlling the electrode diameter, rotation speed, and plasma current is an effective method to produce PREP powder with appropriate powder size. The limitations of increasing the rotational speed to reduce the powder size were clarified by combining numerical simulation and experiments.
A statistical model was established to clarify the relationships between PREP parameters and average powder size. In addition, the average powder size in the evaluated range could be predicted by this statistical model. Ti-6Al-4V alloy with excellent mechanical properties was fabricated by electron beam additive manufacturing using PREP powder.

Free Research Field

Additive manufacturing

Academic Significance and Societal Importance of the Research Achievements

PREP粉末形成におけるPREPパラメータの影響を調査した研究は不足している。さらにはPREP粉末を用いたTi-6Al-4V合金の積層造形に関する研究も少ない。本研究はPREPパラメータが粉末の形成に与える影響を明らかにし、粉末積層造形技術におけるPREP粉末の応用促進を図る。また、本研究で構築された統計モデルは、材料科学におけるデータ科学の応用に新しい方法を示唆している。