Influence of exposure in a corrosive environment on ultimate stress of heat-treated welded joints of Al–Mg–Si–Сu alloy

Abstract The priority task of modern aircraft construction is to ensure the reliability operation structures, which depends both on quality execution technological processes during manufacturing and corrosion-mechanical durability welded joints. This work aims study influence contact duration with a corrosive environment mechanical strength base metal joints Al–Mg–Si–Cu alloy, heat-treated in different modes (artificial aging, quenching followed by artificial aging). Corrosion-mechanical tests were carried out under constant axial tensile stress 3 % NaCl solution for 14 days, determination corrosion rate, ultimate strength, fractographic analysis fracture surface. results showed that resistance almost equal metal. It was experimentally confirmed decreased after exposure solution. caused embrittlement structure formation defects near-surface zone environment, led change like from ductile brittleness.