Fatigue Behavior in an Fe–N Binary Ferritic Steel: Similarity and Difference between Carbon and Nitrogen
Fatigue Behavior in an Fe–N Binary Ferritic Steel: Similarity and Difference between Carbon and Nitrogen
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DOI：
10.2355/isijinternational.isijint-2018-535
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发表时间：
2019-01
影响因子：
1.8
通讯作者：
K. Habib;M. Koyama;E. Sakurada;Nobuyuki Yoshimura;T. Yokoi;K. Ushioda;K. Tsuzaki;H. Noguchi
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文献类型：
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作者：
K. Habib;M. Koyama;E. Sakurada;Nobuyuki Yoshimura;T. Yokoi;K. Ushioda;K. Tsuzaki;H. Noguchi
通过拉压疲劳试验研究了一种全铁素体氮化钢的疲劳裂纹萌生和扩展行为。Fe-0.011质量% N钢没有显示出与动态应变时效相关的锯齿状流动，并且在非扩展疲劳裂纹旁边显示出150 MPa的疲劳极限。裂纹萌生的主要方式是在晶界处，并且裂纹在疲劳极限处和高于疲劳极限处沿着晶界和内部扩展。Fe-N钢没有表现出显著的共轴效应。并与我们以前在Fe-0.006和0.017C钢中的实验结果进行了比较，讨论了它们的异同。
: 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.