摘要
采用定向凝固无余量精铸工艺，制造了接近于空心涡轮叶片的形状和壁厚的管状薄壁（l＝0.8－1.6mm）试样，研究了一种定向凝固高温合金的薄壁性能。结果表明，薄壁试样的持久性能与标准试样（直径5mm）相比没有明显的下降，说明在本试验条件下，该合金的薄壁效应不明显。从工艺因素和显微组织方面讨论了试验结果。
The thin-wall effect of a directionally solidified superalloy has been studied by using tubular hollow specimens (wall thickness l= 0.8, 1.2,1.6 mm) whose shape and thickness are similar to the hollow turbine blades made by the near-shape investigation cast procedure.The results show that stress-rupture properties of thin-wall specimens are not reduced remarkably comparing that of the standard ones (5 mm diamater), i.e., thin-wall effect of this alloy is not remarkable in this experiment. The results differing from that of previous works are discussed in term of cast process and microstructure.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1997年第4期370-374,共5页
Acta Metallurgica Sinica
关键词
定向凝固
高温合金
薄壁效应
显微组织
directionally solidified superalloy, thin-wall effect, stress-rupture property,microstructure
