Ni基超合金Ren880の疲労・クリープ相互作用下の寿命に及ぼす耐食コーティングの影響

概要

論文の詳細を見る
This paper deals with the effects of two types of corrosion resistance coating, CoNiCrAIY and AI chemical vapour deposition (CVD) coating, On the fatigue-creep interaction life of a cast Ni base superalloy Rene'80. Under a fatigue condition, CoNiCrAIY coating improved the resistance to surface crack initiation, while AICVD coating reduced the number of cycles to surface crack initiation. However, the surface crack propagation rates of both the coated and non-coated specimens were about the same value. Under a fatigue-Creep interaction condition, the number of cycles to surface crack initiation of the coated specimen increased in comparison with the non-coated specimen. The surface crack propagation rate of the coated specimen increased in comparison with the non-coated specimens. It was found that the fatigue life of the coated specimen was affected by the oxidation of the specimen surface and the properties of the coating meterial. The life under fatigue creep interaction was affected by the failure mechanism (intergranular cracking) of the base metal Rene'80 rather than the oxidation and the properties of the coating material.
社団法人日本材料学会の論文
1991-02-15