[S7] S7 Materials science of additive manufacturing for biomedical and welfare applications (part III)

[S7.12] Phase Transformation Mechanisms of Biomedical Co-28Cr-6Mo Alloy Depending on the Thermal History in Electron Beam Powder-bed Additive Manufacturing

*ZHAO Yufan¹, KOIZUMI Yuichiro², AOYAGI Kenta³, YAMANAKA Kenta³, CHIBA Akihiko³ (1. 東北大工（院生）、2. 東北大金研（現：阪大工）、3. 東北大金研)

Keywords:Phase transformation、Co-28Cr-6Mo alloy、Thermal histoty、Electron beam powder-bed fusion、Additive manufacturing

Phase transformation in as-built CCM occurred as both isothermal martensitic and diffusional-massive transformation. The difference in γ/ε phase distribution was depending on the thermal history.