FGH95镍基合金的蠕变行为研究  

Creep Behavior of Nickel-base Alloy FGH95

作　　者：张媛[1] 仇志伟[2] 吕彦兴[1] 

机构地区：[1]河北化工医药职业技术学院,河北石家庄050026 [2]河北经贸大学,河北石家庄050061

出　　处：《铸造技术》2014年第10期2211-2213,共3页Foundry Technology

摘　　要：研究了FGH95镍基合金在650℃、1 040 MPa条件下的蠕变行为。结果表明,在蠕变初期,基体中的位错开始形成并呈现出六边形特征,随着蠕变的进行,位错交织在一起。当蠕变进行到100 h后,位错出现在γ和γ′相之间交界处,增强了合金的抗蠕变能力。当蠕变进行到280 h之后,在γ和γ′相交界处的位错呈现出四边形特征,导致该处应力集中,γ′相位错遭到破坏,这时基体中的蠕变位错就会运动到γ′′相之中并形成不全位错和层错的位错组态。The creep behavior of the nickel-based alloy FGH95 was investigated under the condition of 650 ℃ and 1 040 MPa. The results show that the dislocation in the matrix forms and presents hexagonal feature during primary creep. The dislocations become intertwined with the further creep. The dislocations appear at the boundary between y and γ＇ phases after the creep for 100 h, which enhance the creep resistance of the alloy. The dislocation at the boundary between y and γ＇ phases presents a quadrilateral characteristic after the creep for 280 h, causing the concentration of stress, and thus the dislocation of γ＇ phase is destroyed. At this time, the creep dislocation in the matrix phase moves into the γ＇ phase and forms the dislocation Configuration of non-complete dislocations and stacking faults.

关 键 词：FGH95镍基合金 蠕变 位错网 

分 类 号：TG146.15[一般工业技术—材料科学与工程]