摘要
研究了FGH96合金在再结晶退火中的静态再结晶行为,并对再结晶机理进行了讨论与分析。结果表明:在较大冷变形量下,FGH96合金的静态再结晶在很短时间内完成,再结晶组织中有大量的孪晶组织。冷变形造成γ′/γ界面上的位错塞积,再结晶形核方式形核有亚晶粗化形核和应变诱导晶界移动(SIBM)方式。γ′相在应变诱发晶界迁移(SIBM)机制中起到两方面作用:一为冷变形在γ′/γ界面上形成高密度的位错塞积,这为晶界单向移动并为最终的再结晶形核提供驱动力,二是再结晶晶粒晶界的移动速度(即晶粒的长大)受到γ′相的分解速率控制。
The static recrystallization (SRX) behavior of FGH96 superalloy during annealing process was studied. The results show that SRX of FGH96 superalloy can be completed during short time, and many twins form during annealing process under heavy cold deformation condition. Accumulation of dislocation at the interface of prime gamma and matrix (γ'/γ) is formed by cold deformation. The nucleation mechanisms of SRX are sub-grain merging and strain-induced boundary migration (SIBM). For the mechanism of SIBM, dislocations pile up at γ'/γ interface, which can offer energy for nucleation, and the grain growth is also controlled by the resolution rate of prime gamma.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2005年第6期12-15,共4页
Transactions of Materials and Heat Treatment
基金
国家"十五"民口配套重大研究项目(MKPT-01-127ZD)
关键词
FGH96合金
静态再结晶
形核机制
Annealing
Grain growth
Nickel alloys
Nucleation
Powder metallurgy
Recrystallization (metallurgy)
