各種環境下におけるオーステナイト系ステンレス鋼の疲労強度 : 疲労微小き裂の発生, 密度・分布および成長

概要

論文の詳細を見る
Fatigue tests under rotating bending and reversed torsion were conducted in air, distilled water and 3 percent saltwater, using smooth specimens of austenitic stainless steels, SUS 304. The nitiation, density and distribution, and growth behavior of small fatigue cracks were examined based on the detailed observations, and the effect of aqueous enviroment on fatigue strength was evaluated. Under rotating bending, the fatigue life life larger in distilled water and 3 percent saltwater than in air in the high stress region, but the strength decreased with increaing aggressiveness of test environment in the low stress region. Under reversed torsion, on the other hand, the fatigue strength was higher in an aqueous environment than in air in the whole stress region. These results were strongly related to various behaviours of small fatigue cracks such as initiation, density and growth, and were explained in terms of both cooling and corrosion effects of aqueous corrosive environment.
社団法人日本材料学会の論文
1985-07-15