TY - GEN
T1 - Internal fracture process in fatigue of radical nitrided bearing steel
AU - Morino, K.
AU - Kawagoishi, N.
AU - Chen, Q.
AU - Fukada, K.
AU - Kondo, E.
N1 - Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2003
Y1 - 2003
N2 - Rotating bending fatigue tests were carried out for a radical nitrided bearing steel in order to investigate the initiation and propagation behavior of an internal crack. Surface fracture occurred under high stress levels and fish-eye fracture happened under low stress levels so that the S-N curve appeared in the shape of two-step lines. The depth of the origin of internal fracture was confined in a relatively narrow region near the boundary between the hardened and non-hardened matrix. By two-step loading fatigue tests in the internal fracture region, a circular trace corresponding to the stress change was observed within the fish-eye. In the internal fracture region, a crack was initiated at the early stage of the fatigue process, that is, most of the fatigue life of internal fracture was occupied by the growth life of an internal crack.
AB - Rotating bending fatigue tests were carried out for a radical nitrided bearing steel in order to investigate the initiation and propagation behavior of an internal crack. Surface fracture occurred under high stress levels and fish-eye fracture happened under low stress levels so that the S-N curve appeared in the shape of two-step lines. The depth of the origin of internal fracture was confined in a relatively narrow region near the boundary between the hardened and non-hardened matrix. By two-step loading fatigue tests in the internal fracture region, a circular trace corresponding to the stress change was observed within the fish-eye. In the internal fracture region, a crack was initiated at the early stage of the fatigue process, that is, most of the fatigue life of internal fracture was occupied by the growth life of an internal crack.
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M3 - Conference contribution
AN - SCOPUS:3042523711
SN - 1853129623
T3 - Computational and Experimental Methods
SP - 213
EP - 222
BT - Surface Treatment VI
A2 - Brebbia, C.A.
A2 - Hosson, J.T.M.
A2 - Nishida, S.-I.
T2 - Sixth International Conference on Computer Methods and Experimental Measurements for Surface Treatment Effects, Surface Treatment VI
Y2 - 11 March 2003 through 13 March 2003
ER -