Re对单晶高温合金蠕变过程中γ′相定向粗化的影响  

Effects of Re on γ′ Directional Coarsening in Single Crystal Superalloys During Creep

作　　者：骆宇时[1] 李嘉荣[1] 刘世忠[1] 曹春晓[1] 

机构地区：[1]北京航空材料研究院先进高温结构材料国防科技重点实验室,北京100095

出　　处：《材料工程》2006年第7期43-46,50,共5页Journal of Materials Engineering

摘　　要：通过对三种Re含量不同的单晶高温合金1100℃/140MPa蠕变实验及组织分析,研究了Re对单晶高温合金蠕变过程中γ′相定向粗化的影响。结果表明,在单晶高温合金蠕变过程中,Re促进形成完整、细密、连续的γ′筏排组织,降低合金元素扩散速率,延缓γ通道厚度的增加,降低γ′相体积分数的减小速率,从而稳定了对合金高温强度起重要作用的γ′相,使γ′相的强化作用持续较长时间。Based on the analysis to the creep behaviors of three experimental single crystal superalloys with various Re contents at 1100℃/140MPa, the effects of Re on the γ′ directional coarsening in single crystal superalloys were investigated. The results show that Re significantly promotes the formation of regular and perfect γ′ rafts, decreases the diffusion rate of element, restrains the increasing of the thickness of γ phase and confines the decreasing rate of the volume fraction of γ′ phase during creep, so γ′ phase is stabilized and its strengthening effects prolonged.

关 键 词：RE γ′ 定向粗化 单晶高温合金 蠕变 

分 类 号：TG132.32[一般工业技术—材料科学与工程] TG146.4[金属学及工艺—合金]