[en] AA2024 aluminium alloy is used in aeronautics for various applications. However, the aging treatment ('T4 temper') at ambient temperature used to bring it to optimal mechanical properties causes several problems. The main one is its duration (5 days) which brings the need for storage of the parts. Moreover temperature control during such a long period is difficult.
The aim of this work was to develop an alternative treatment leading to optimized mechanical properties in a shorter time. For this, we investigated the kinetics of the aging process and observed the apparition and disappearance of 'Portevin-Le Chatelier (PLC) effect' in AA2024 aluminium alloy.
The knowledge of the time at which PLC effect is observed is important in terms of process because shaping may be carried out before the end of the aging process.
