From the viewpoint of demand and production, aluminium and its alloys take only second place to steels. Because of their advantageous combination of physical, mechanical, anticorrosive and processing properties, aluminium-based light alloys find their place not only in aircraft constructions, but also in other branches of industry and general building. This article discusses various types and general weldability characteristics of new, high-strength aluminium alloys. It is also concerned with the nature of the physical and metallurgical processes taking place during welding. It deals specifically with the generation and methods of preventing oxide inclusions from appearing in weld metal, with the assessment of crystallization of weldments made up of multielement alloys, the incidence of weld porosity, hot cracking, chemical and structural heterogeneity, and with the methods of preventing these phenomena from occurring. An analysis of the structural changes which cause reduction in the strength of the material in the heat affected zone to occur has also been made. Characteristic features of both new and improved methods of arc welding, incorporating electron and laser beams as sources of energy are discussed. Finally, some examples of the use of aluminium alloys in the welded constructions of new types of equipment are provided. The lines along which future investigations and developments should proceed to improve weldability of new, high-strength light materials intended for a variety of machine-building branches of industry are illustrated.
High-strength aluminium alloys for welded structures in the aircraft industry
Welding International ; 19 , 3 ; 173-185
2005
13 Seiten, 14 Bilder, 9 Tabellen, 46 Quellen
Article (Journal)
English
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