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ABSTRACT
Welding is a technique for the assembly of materials found throughout all the sectors of modern construction. Yet this seemingly simple operation involves various physical phenomena that finally modify, at different levels, the metallurgy of the material, the geometry of the connection, and internal elastic stress distribution. This paper presents a sum of knowledge, terminology and definitions, mainly oriented toward the design of welded mechanical parts. It approaches the classification of defects in the welded joints and the condition of their acceptability through compliance with suitable construction rules.
Read this article from a comprehensive knowledge base, updated and supplemented with articles reviewed by scientific committees.
Read the articleAUTHOR
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Alain MICHEL: CNAM and ESSA engineer - Expert, lecturer, retired - Institut de soudure industrie, Villepinte France - École supérieure du soudage et de ses applications, Yutz France
INTRODUCTION
Welding has been used for more than a century, and is now a material joining technique used in all sectors of modern construction, including mechanical parts.
However insignificant the operation may still appear to some designers of mechanical assemblies, welding is nonetheless an operation that brings into play multiple physical processes whose consequences are fundamental to the durability of the connection in service.
In view of the sheer diversity of joining processes and the ever-increasing range of metallic materials to which welding can be applied, it is essential to include a minimum of reminders and definitions in this first article. However, these are focused on the fields of design-calculation, choice of materials, manufacturing, treatment and non-destructive testing of welded mechanical parts.
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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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