[SS] S6 Materials Science of Additive Manufacturing IX

2:00 PM - 2:20 PM JST(5:00 AM - 5:20 AM UTC)

[S6.23] Microstructural Control of Oxygen-added β-containing TiAl Alloys Fabricated by Metal Additive Manufacturing

○Yuya Watanabe¹, Ken Cho¹, Masao Takeyama², Takayoshi Nakano¹, Hiroyuki Yasuda¹ (1. UOsaka, 2. Inst. of Sci. Tokyo)

Keywords:

TiAl,Electron Beam Powder Bed Fusion,Microstructural Control,Oxygen Addition,Mechanical Properties

Oxygen-added β-containing TiAl alloys fabricated by EB-PBF were controlled via two-step heat treatment. Introducing grain-boundary β phase by β+α solution treatment suppressed oxygen rejection and oxide formation during aging, giving an excellent strength–ductility balance.