Potential resistance to transgranular fatigue crack growth of Fe–C alloy with a supersaturated carbon clarified through FIB micro-notching technique

Overview of Dynamic Strain Aging and Associated Phenomena in Fe–Mn–C Austenitic Steels

“…(11). [76][77][78][79] Similarly, the DSA in high-Mn austenitic steels also improves the fatigue limit. Figure 13(a) shows the fatigue limits comparatively analyzed in TWIP steels with and without carbon.…”

Fatigue Behavior in an Fe–N Binary Ferritic Steel: Similarity and Difference between Carbon and Nitrogen

“…In this study, we therefore focused on the fatigue damage evolution from crack initiation to mechanically or microstructurally small crack growth that covers 70% of fatigue life in steels. 9) In our previous studies 2,3,10,11) regarding Fe-C binary steels with supersaturated solute carbon, we clarified certain points in terms of fatigue crack initiation and small crack growth behavior. Therefore, we can interpret the fatigue behavior of an Fe-N alloy by comparison with that of the Fe-C alloys.…”

Intrinsic Factors that Trigger the Coaxing Effect in Binary Fe–C Ferritic Alloys with a Focus on Strain Aging

“…The IF steel is the same as that used in a previous study. 6) Chemical compositions of the steels used are listed in Table 1. The work hardening behavior of the Fe-0.017C alloy was varied by microstructural control through heat treatment with the same chemical composition.…”

“…1,2) The primary factors that affect crack nonpropagation behavior in ferritic steels are plasticity-induced crack closure 3) and strain-age hardening at a crack tip. [4][5][6] In addition, suppression of fatigue crack initiation is crucial even for the crack propagation phenomenon, since fatigue cracks can propagate through the coalescence of cracks when subcracks form in the vicinity of the main crack. 7,8) Once the fatigue crack ceases to propagate without new crack initiation, the specimen does not show failure in an ideal constant loading condition.…”