Influence of stress-relieving by vibration as compared with post-weld heat treatment on the fatigue behaviour of repaired weld
The aim of the present research was to determine the effectiveness of vibrational stress relief (VSR) compared to post weld heat treatment (PWHT), especially for welded structures with repaired welds. In the investigations, several test series were carried out, where welded components in different fabrication states (as welded, vibrated after welding, heat treated after welding and preloaded after welding), were submitted to fatigue loading. It was found that due to the absence of sound and commonly accepted guidelines and quality criteria, the success of vibrational stress relief is quite uncertain. Furthermore, it was found that in fatigue loading, VSR probably has no significant beneficial effect. During the first load cycles, about the same stress relief occurs as during VSR. Only in cases of very low stresses and low R-ratios, may VSR have any positive effect on the fatigue life of welded structures.
Bibliographic Reference: EUR 14484 EN (1993) 103 pp., FS, ECU 12
ISBN: ISBN 92-826-5110-X
Record Number: 199310418 / Last updated on: 1994-11-29
Original language: en
Available languages: en