TY - JOUR
T1 - Application of the Microcrack Growth Law-Oriented Approach for Assessing Anisotropy in the Low-Cycle Fatigue Strength of Thick Forged A 533 B Steel Plates
AU - Harada, Shoji
AU - Endo, Tatsuo
AU - Fukushima, Yoshihiro
AU - Sakata, Toshimitsu
PY - 1987
Y1 - 1987
N2 - The microcrack growth law-oriented approach developed in a previous paper is applied to examine the fatigue strength and mechanism of 200 mm and 100 mm thick forged steel plates. Low-cycle fatigue tests are conducted on specimens sliced in the transverse (T) and thickness (S) directions of the plates. Through continual observation of the fatigue process, the effect of elongated inclusions on microcrack initiation and propagation behaviors is elucidated. The fatigue life is shorter in the S than in the T direction. The fatigue lives in both directions are evaluated on the basis of the microcrack propagation law. The elongated inclusions hardly affect the fatigue process in the T direction, while they show a strong influence in the S direction. The fatigue process is dominated by a monotonous growth of a leading crack in the T direction. On the contrary, the leading crack growth in the S direction is governed by a joining of subcracks.
AB - The microcrack growth law-oriented approach developed in a previous paper is applied to examine the fatigue strength and mechanism of 200 mm and 100 mm thick forged steel plates. Low-cycle fatigue tests are conducted on specimens sliced in the transverse (T) and thickness (S) directions of the plates. Through continual observation of the fatigue process, the effect of elongated inclusions on microcrack initiation and propagation behaviors is elucidated. The fatigue life is shorter in the S than in the T direction. The fatigue lives in both directions are evaluated on the basis of the microcrack propagation law. The elongated inclusions hardly affect the fatigue process in the T direction, while they show a strong influence in the S direction. The fatigue process is dominated by a monotonous growth of a leading crack in the T direction. On the contrary, the leading crack growth in the S direction is governed by a joining of subcracks.
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U2 - 10.1299/kikaia.53.26
DO - 10.1299/kikaia.53.26
M3 - Article
AN - SCOPUS:0023164306
SN - 0387-5008
VL - 53
SP - 26
EP - 32
JO - Transactions of the Japan Society of Mechanical Engineers Series A
JF - Transactions of the Japan Society of Mechanical Engineers Series A
IS - 485
ER -