材料
Online ISSN : 1880-7488
Print ISSN : 0514-5163
ISSN-L : 0514-5163
論文
オーステナイト系ステンレス鋼に付与した人工腐食ピットからの疲労き裂発生・進展挙動評価
政木 清孝越智 保雄松村 隆
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ジャーナル フリー

2005 年 54 巻 12 号 p. 1262-1267

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In order to evaluate the effect of stress concentration on long life fatigue properties of SUS316NG and SUS304TP, rotating bending fatigue tests were carried out using the specimen with artificial corrosion pits. And then, to evaluate the fatigue crack initiation and propagation properties from the pits, the stress intensity factor range was calculated by the pit diameter at surface and the pit depth which were obtained by optical microscope observations, and also it was calculated by the pit area on fracture surface which obtained by SEM observations. As the results, the surface fatigue crack initiation and propagation properties of both austenitic stainless steels could be evaluated by the value of the stress intensity factor range which calculated using the pit diameter at surface and maximum pit depth by the optical microscope observation.

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© 2005 日本材料学会
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