Assessment of 1161at aluminum alloy susceptibility to operational degradation
摘要
Structure, physicomechanical characteristics, and fracture micromechanisms under static and cyclic loading of samples cut from clad 2 mm thick sheet made of 1161AT alloy of the Al–Cu–Mg–Mn–Zr system with a reduced content of Si and Fe (up to 0.1 wt% of each) were studied. This alloy in the initial state (quenching and natural aging) and after the influence of thermomechanical factors in laboratory conditions which simulate the effects of operational ones were investigated. The 1161AT alloy shows practically the same service characteristics in the initial state and after model degradation, contrary to similar alloys with increased content of Si and Fe impurities (up to 0.5 wt% of each).