IIW Recommendations on Methods for Improving the Fatigue Strength of Welded Joints Ii

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IIW Recommendations on Methods for Improving the Fatigue Strength of Welded Joints IIW-2142-110.

Author: P. J. Haagensen and S. J. MaddoxOxford | Size: 4 MB | Format: PDF | Quality: Unspecified | Publisher: Woodhead Pub Ltd | Year: 2013 | pages: 46 | ISBN: 9781782420644

The weld toe is a primary source of fatigue cracking because of the severity of the stress concentration it produces. Weld toe improvement can increase the fatigue strength of new structures significantly and can also be used to repair or upgrade existing structures. However, practitioners have reported wide variations in the actual improvements in fatigue strength. Based on an extensive testing program organized by the International Institute of Welding (IIW), this report reviews the main methods for weld toe improvement to increase fatigue strength: burr grinding, TIG dressing and hammer and needle peening. The report provides specifications for the practical use of each method, including equipment, weld preparation and operation. It also offers guidance on inspection, quality control and training as well as assessments of fatigue strength and thickness effects possible with each technique. These recommendations will allow for a more consistent use of these methods and more predictable increases in fatigue strength.

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