[P] 第3分野　組織・計算科学　P79~P89

[P35] Elucidation of abnormal grain growth during solution heat treatment of polycrystalline Ni-based superalloy

○Quyen Van Trinh¹, Anh Hoang Pham², Shigekazu Morito², Mark Hardy³ (1. Shimane University, Graduate School of Natural Science and Technology, 2. Shimane University, Faculty of Materials for Energy, 3. Rolls-Royce Plc)

Keywords:

abnormal grain growth

This study investigates abnormal grain growth (AGG) during solution heat treatment of polycrystalline Ni-based superalloy RR1073. Observing in-situ inside HT-LCSM and EBSD/EDS analyses reveal that AGG initiates via strain-induced boundary migration and continues by capillary-driven growth under super-solvus conditions.