Matériaux & Techniques
Volume 76, Number 11-12, 1988
|Page(s)||7 - 15|
|Published online||19 April 2017|
Soudabilité d'alliages Al - Li - Cu - Mg1
Weldability of Al-Li-Cu-Mg Alloys
GIAT/ATS, Centre de Recherches des Matériaux, Tarbes
The weldability of two aluminium-lithium alloys: CP271 (8090) and CP276, welded by gas tungsten arc (GTA) process, has been investigated. First results show that :
the welding of T851-treated alloys leads to important weld porosity, which is related to a 0.2 mm surface layer formed during solution heat treatment;
tensile strength joint efficencies (JE) of 50 % were obtained without post welding heat treatment or after artificial aging. By repeating the entire heat treatment of the alloy, JE could be increased up to 80 % ;
stress corrosion behaviour is sharply influenced by the post-welding heat treatment.
© SIRPE 1988
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