航空材料学报2009，Vol.29Issue(6)：33-37,5.DOI:10.3969/j.issn.1005-5053.2009.6.007
FGH95粉末镍基合金热处理后的微观组织与蠕变性能
Microstructure and Creep Features of FGH95 Powder Nickel Base Superalloy after Heat Treatment
田素贵 1刘洋 1赵忠刚 1包宪宇1
作者信息
- 1. 沈阳工业大学,材料科学与工程学院,沈阳,110023
- 折叠
摘要
Abstract
By means of the measurement of creep curves and microstructure observation, an investigation has been made into the microstructure and creep behaviors of FGH95 powder nickel-base superalloy. Results show that, after solution treated, microstructure of the alloy consists of the finer γ′ phase and γ matrix, and the finer (Nb,Ti)C carbide particles is discontinuously precipitated within the grains and grain boundaries. In the range of the applied temperatures and stresses, the alloy displays an obvious sensibility of the applied temperatures, and the creep activation energy and stress exponent of the alloy during steady state stage are calculated to be Q=542.07kJ/mol and n=14.8, respectively. The deformation mechanism of the alloy during creep is that the double orientation slipping of dislocation are activated in the alloy. The <110> super-dislocation which shears into γ′ phase may be decomposed into two of (1/3)<112> super-shockleys dislocation to form the dislocation configuration of the partial+stacking fault. And in the further, the twinning plane activated during twinning deformation is determined as (111) plane. The boundaries and (Nb,Ti)C carbide particles which is discontinuously precipitated along the grain boundary may effectively hinder the movement of dislocation, which is thought to be one of the main reasons for the alloy displaying a better creep resistance.关键词
FGH95粉末镍基合金/固溶处理/组织结构/蠕变特征Key words
FGH95 powder nickel-base superalloy/ solution treatment/ microstructure/ creep features分类
矿业与冶金引用本文复制引用
田素贵,刘洋,赵忠刚,包宪宇..FGH95粉末镍基合金热处理后的微观组织与蠕变性能[J].航空材料学报,2009,29(6):33-37,5.
