[G] Fundamentals of Mechanical Properties(2)

[168] Effect of continuous precipitation of β particles on discontinuous precipitation of β/γ cellular microstructure in TiAl alloys

*Ryosuke YAMAGATA¹, Kenta Murata², Akihiro Hanada³, Hideki Wakabayashi⁴, Hirotoyo Nakashima⁵, Masao Takeyama⁵, Takaomi Itoi¹ (1. Chiba Unversity, 2. Tokyo Institute of Technology (Present: Japan Steel Works, Ltd.), 3. Tokyo Institute of Technology (Present: Kobe Steel, Ltd.), 4. Shimane University, 5. Tokyo Institute of Technology)

Keywords:TiAl基合金、セル状析出反応、JMAK解析

TiAl基合金におけるβ/γセル状組織形成の速度論に及ぼすα₂/γ界面へのβ粒連続析出の影響を調査した．β粒析出に伴いラメラ母相中のCr過飽和度が消費されセル状析出の駆動力が低下し，生成速度の低下が生じた．