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
N1 - Publisher Copyright:
© 2015 ISIJ.
Copyright:
Copyright 2015 Elsevier B.V., All rights reserved.
PY - 2015
Y1 - 2015
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/isijinternational.ISIJINT-2015-305
DO - 10.2355/isijinternational.ISIJINT-2015-305
M3 - Article
AN - SCOPUS:84948776004
SN - 0915-1559
VL - 55
SP - 2463
EP - 2468
JO - Transactions of the Iron and Steel Institute of Japan
JF - Transactions of the Iron and Steel Institute of Japan
IS - 11
ER -