有色金属科学与工程2017，Vol.8Issue(1)：118-121,144,5.DOI:10.13264/j.cnki.ysjskx.2017.01.020
一种单晶高温合金的组织和持久性能
Microstructure and stress rupture properties of a single crystal superalloy
摘要
Abstract
The microstructure and stress rupture properties at three different conditions of the second generation single crystal superalloy has been investigated. The results show that the γ matrix, γ' phase and eutectic can be seen in the as-cast microstructure of the alloy. There are no eutectic and incipient melting and good cubicγ' phase in the alloy after strandard heat treatment. The alloy has excellent stress rupture properties at different conditions. The fracture mechanism of stress rupture of the alloy at 760 ℃/800 MPa shows quasi-cleavage mode and the fracture mechanism at 980℃/250 MPa and 1100℃/140 MPa shows dimple model. The morphology of γ' phase is almost no change at 760℃/780 MPa. The γ' rafts form at 980 ℃/250 MPa and 1100 ℃/140 MPa and the thickness of rafts increases with the temperature increasing.关键词
单晶高温合金/γ'相/持久性能/断裂机制Key words
single crystal superalloy/γ'microstructure/stress rupture properties/fracture mechanism分类
矿业与冶金引用本文复制引用
刘世忠,史振学,熊继春,李嘉荣..一种单晶高温合金的组织和持久性能[J].有色金属科学与工程,2017,8(1):118-121,144,5.基金项目
国防基金(9140A18040115HK51248) （9140A18040115HK51248）
