Materials which cannot be fusion welded such as stainless steels and aluminium, are generally assembled by screwed on flange. When an absolute leak tightness is required in severe environment (thermal and pressure cycling vibrations), such assemblies are not fully reliable. Various techniques can be considered (Brazing-Hot Isostatic Pressing-explosion or friction welding). A R. and T. program has been initiated by the CNES and L'AIR LIQUIDE to study the feasability of such techniques in the case of materials and equipment for space systems. The best esults have been obtained with friction welding which has been selected and qualified for the assembly of Inconel and 2219 alloys parts of the Ariane 5 Helium Subsystem.
Joining dissimilar metals
Verbinden nichtgleichartiger Metalle
1994
3 Seiten
Conference paper
English
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