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研究了高体积百分数γ＇相强化的粉末镍基高温合金在形变过程中发生再结晶行为。实验表明:在γ＇相溶解温度以上再结晶以应变诱发界面迁移方式进行。在γ＇溶解温度以下,γ相再结晶以亚晶粒粗化形核方式进行。在γ相再结晶的内界面上可能发生γ＇相的分解和随后的再析出。计算了γ相再结晶内界面迁移激活能为635kJ/mol
The recrystallization behavior of powdery nickel base superalloy with high volume percent γ ’phase strengthening during deformation was investigated. Experiments show that: recrystallization above the γ ’phase dissolution temperature is induced by strain-induced interface migration. Below the γ ’dissolution temperature, the γ-phase recrystallization takes place in a subgrain coarsening nucleation mode. Decomposition and subsequent re-precipitation of the γ ’phase may occur at the recrystallized γ interface. The activation energy of interfacial transition of γ phase recrystallization was calculated to be 635 kJ / mol