TY - GEN
T1 - On fish-eye fracture of radical nitrided die steel
AU - Kawagoishi, N.
AU - Morino, K.
AU - Fukada, K.
AU - Chen, Q.
AU - Kondo, E.
N1 - Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2001
Y1 - 2001
N2 - In order to investigate the effect of radical nitriding on fatigue strength of die steel, rotating bending fatigue tests were carried out at room temperature and 450°C. Fatigue strength was increased by nitriding at both temperatures due to surface hardening and compressive residual stress generated in the surface region. Comparing with the non-nitrided steel in which the fracture origin was at surface slip bands or surface defects, the nitrided steel fractured with the origin at inner inclusions at both temperatures. In the nitrided steel, cracks initiated from inclusions in the non-hardened layer or near the boundary between hardened and non-hardened layers. The difference in fatigue strength between the two temperatures was discussed based on the feature of fish-eye.
AB - In order to investigate the effect of radical nitriding on fatigue strength of die steel, rotating bending fatigue tests were carried out at room temperature and 450°C. Fatigue strength was increased by nitriding at both temperatures due to surface hardening and compressive residual stress generated in the surface region. Comparing with the non-nitrided steel in which the fracture origin was at surface slip bands or surface defects, the nitrided steel fractured with the origin at inner inclusions at both temperatures. In the nitrided steel, cracks initiated from inclusions in the non-hardened layer or near the boundary between hardened and non-hardened layers. The difference in fatigue strength between the two temperatures was discussed based on the feature of fish-eye.
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M3 - Conference contribution
AN - SCOPUS:2942692154
SN - 1853128643
T3 - Computational and Experimental Methods
SP - 209
EP - 217
BT - Surface Treatment V
A2 - Sarler, B.
A2 - Brebbia, C.A.
A2 - Brebbia, C.A.
T2 - Fifth International Conference on Computer Methods and Experimental Measurements for Surface Treatment Effects, Surface Treatment V
Y2 - 20 June 2001 through 22 June 2001
ER -