Sub-solvus Cellular Recrystallization and P Phase Formation in a Single-Crystal Superalloy Containin

• 作 者: Long-Chao Zhuo Ming Huang Ji-Chun Xiong Jia-Rong Li Jing Zhu
• 机 构: The State Key Laboratory of New Ceramics and Fine Processing, Laboratory of Advanced Materials (MOE)
• 出 处: Acta Metallurgica Sinica(English Letters)
• 发表日期: 2015年01期
• 关键词: superalloy annealing migration attributed dissolution SAED creep precipitate acc

Sub-solvus recrystallization behavior of a second-generation single-crystal superalloy has been studied by transmission electron microcopy and scanning transmission electron microcopy. Surface local stress facilitated cellular recrystallization accompanied with formation of twin structure and TCP phase of P during annealing at sub-solvus temperature of 1,100 °C. The precipitation of P phase is considered to be attributed to the coarsening of c0 phase in the recrystallized aggregates which lower the activation energy for atomic migration.

Sub-solvus recrystallization behavior of a second-generation single-crystal superalloy has been studied by transmission electron microcopy and scanning transmission electron microcopy. Surface local stress facilitated cellular recrystallization accompanied with formation of twin structure and TCP phase of P during annealing at sub-solvus temperature of 1,100 ° C. The precipitation of P phase is considered to be attributed to the coarsening of c0 phase in the recrystallized aggregates which lower the activation energy for atomic migration.