鉄と鋼
Online ISSN : 1883-2954
Print ISSN : 0021-1575
ISSN-L : 0021-1575
論文
Fe-N二元フェライト鋼における疲労挙動:炭素と窒素の類似点と相違点
ハビブ キシャン小山 元道 桜田 栄作吉村 信幸横井 龍雄潮田 浩作津﨑 兼彰野口 博司
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2020 年 106 巻 6 号 p. 413-419

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Fatigue crack initiation and propagation behavior of a water-quenched fully ferritic nitrogen steel were investigated by means of tension-compression fatigue tests. The Fe-0.011 mass% N steel showed no serrated flow associated with dynamic strain aging, and showed a fatigue limit of 150 MPa alongside a non-propagating fatigue crack. The major mode of crack initiation was at the grain boundaries, and the cracks propagated along the grain boundaries and interiors at and above the fatigue limit. The Fe-N steel did not exhibit a significant level of coaxing effect. The results were compared with our previous findings in Fe-0.006 and 0.017C steels, and the similarity and difference were discussed.

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© 2020 一般社団法人 日本鉄鋼協会

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