Microstructural change of the HAZ in an MIG welded bond on an AA7020 aluminium alloy: stress corrosion crack growth rate in dissimilar metal welds

Abstract

[EN] Many researchers have undertaken studies into the mechanical behaviour of the welded bond,1,2 others have devoted their attentions to metallurgical phenomena, whether concerning phenomena inherent to the area immediately surrounding the weld interface or concerning models or simulations of the welded structure;3,4 in addition, there are those who have made comparisons between different welding methods2 or who have dedicated their time to post-welding treatments.5 However, very few researchers have devoted their attentions to studying microstructural change throughout the HAZ on welded test pieces.