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3. Welding defects
3.1 Basics of defect classification
There are many bases for classifying defects in welded assemblies:
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to the type of defect itself, leading to the following two categories:
internal or open compactness defects,
shape defects, which can themselves be subdivided at the bead level (channels, convexity) or at the joint level (unevenness, angular misalignment);
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to the morphology of compactness defects, and here again two important classes with regard to behaviour under load can be observed:
flat defects (i.e. those that evolve under loading),
volume defects...
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Welding defects
Rules defining the quality of welded constructions
Bibliography
Websites
http://fr.wikipedia.org/wiki/soudage
http://fr.wikipedia.org/wiki/soudage_(théorie)
Standards and norms
- Welding – Multilingual list of terms relating to assemblies and welded joints, with illustrations - NF EN ISO 17659 - 12-04
- Welding and related techniques – Classification of geometric defects in welds of metallic materials – Part 1: fusion welding - NF EN ISO 6520-1 - 09-07
- Welding and related techniques – Classification of geometric defects in welded metal parts – Part 2: pressure welding - NF EN ISO...
Regulations
Decree no. 99-1046 of December 13, 1999 on pressure equipment.
Directory
Research laboratories – Schools – Literature watch
Welding Institute http://www.isgroupe.com
LIMATB Laboratoire d'Ingénierie des MATériaux de Bretagne, Thermique et Énergétique ET2E team, Université de Bretagne-Sud, Centre de recherche Christiaan Huygens, Lorient
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