TY - JOUR
T1 - Intergranular fatigue crack initiation and its associated small fatigue crack propagation in water-quenched fe-c fully ferritic steel
AU - Koyama, Motomichi
AU - Xi, Zhou Jia
AU - Yoshida, Yuichi
AU - Yoshimura, Nobuyuki
AU - Ushioda, Kohsaku
AU - Noguchi, Hiroshi
PY - 2016
Y1 - 2016
N2 - The fatigue crack initiation and propagation behavior of a water-quenched binary Fe-C fully ferritic steel was investigated though rotating-bending fatigue testing. Intergranular and transgranular crack initiation and propagation were observed. The intergranular crack propagation did not stop, while the transgranular crack propagation was retarded by crack closure and strain aging. As a result, intergranular cracking was the dominant cause of fatigue damage in the steel. A considerable number of cracks were initiated; these propagated through coalescence, which occurred mainly at the grain boundaries. Dominancy of the intergranular fatigue crack propagation increased with increasing stress amplitude. In addition, the steel showed coaxing effect significantly. The coaxing effect suppresses crack initiation as well as crack propagation.
AB - The fatigue crack initiation and propagation behavior of a water-quenched binary Fe-C fully ferritic steel was investigated though rotating-bending fatigue testing. Intergranular and transgranular crack initiation and propagation were observed. The intergranular crack propagation did not stop, while the transgranular crack propagation was retarded by crack closure and strain aging. As a result, intergranular cracking was the dominant cause of fatigue damage in the steel. A considerable number of cracks were initiated; these propagated through coalescence, which occurred mainly at the grain boundaries. Dominancy of the intergranular fatigue crack propagation increased with increasing stress amplitude. In addition, the steel showed coaxing effect significantly. The coaxing effect suppresses crack initiation as well as crack propagation.
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U2 - 10.2355/tetsutohagane.TETSU-2015-108
DO - 10.2355/tetsutohagane.TETSU-2015-108
M3 - Article
AN - SCOPUS:84969750064
SN - 0021-1575
VL - 102
SP - 268
EP - 273
JO - Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
JF - Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
IS - 5
ER -