[G] 耐熱材料(2)

[281] Grain-size-dependent KJMA model and the precipitation of the intergranular δ-Ni₃Nb phase in superalloy 718

*阮 晶晶¹、上島 伸文¹、及川 勝成¹ (1. 東北大工)

キーワード：Superalloy 718、KJMA model、δ-Ni₃Nb

Uniform microstructure in turbine disk is realized by hot-forging process where δ-Ni₃Nb phase is necessary. We proposed a grain-size-dependent KJMA model for describing growth behaviors of δ-Ni₃Nb.