Effect of ultrasonic peening on fatigue crack propagation from a weld toe
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Date
2016-07-10
Journal Title
Journal ISSN
Volume Title
Publisher
International Institute of Welding
Abstract
The objective of this work was to investigate the effect of ultrasonic peening on the fatigue propagation life for a semi-elliptical flaw at a T-butt weld toe. A number of T-butt joints have been fabricated from 10 mm thick A350 grade black mild steel plate. Through-thickness residual stresses at the weld toe have been measured using neutron diffraction for both as-welded and ultrasonically peened joints. Ultrasonic peening is relatively cheap, can be applied in-situ and offers significant improvements in the lifespan of welded components when applied correctly. Numerical analyses were conducted using BDKH stress intensity and HBC stress distribution parametric equations in conjunction with the Paris Law and Forman Equation fatigue crack growth models.
Description
Keywords
Steels, Welded joints, Shot peening, Residual stresses, Fatigue, Crack propagation, Parametric analysis
Citation
Hellier, A. K., Prusty, G. B., Pearce, G. M., Reid, M. & Paradowska, A. (2016) Effect of ultrasonic peening on fatigue crack propagation from a weld toe. Poster presented at IIW2016, 69th International Institute of Welding Annual Assembly and International Conference, Melbourne Convention and Exhibition Centre, Melbourne, 10 - 15 July 2016.