Effect of Pre-Heat Treatment and Processing Regime on the Behavior of Aluminum Alloy ۲۰۲۴ During Equal Channel Angular Pressing

Aluminum alloy ۲۰۲۴ is widely used in various industries, making its strengthening a critical area of research. Severe plastic deformation (SPD) has emerged as a promising method for enhancing the mechanical properties of AA۲۰۲۴; however, few studies have examined the influence of processing parameters on its microstructure evolution and mechanical performance during SPD. In this study, the effects of pre-processing heat treatment and deformation regime on AA۲۰۲۴ during equal channel angular pressing (ECAP) were investigated. The alloy was subjected to two different heat treatments prior to ECAP and processed at two distinct temperatures. Optical microscope (OM) and scanning electron microscopy (SEM) were used to monitor microstructure changes, while Vickers hardness testing evaluated the hardness variation following processing. The results reveal that multiple ECAP passes can only be applied successfully after overaging, as the workability of the alloy is compromised following solution treatment. Furthermore, increasing the processing temperature from ۲۵ ºC to ۱۵۰ ºC has a limited effect on the alloy's behavior.

کلیدواژه ها:

AA۲۰۲۴ ، severe plastic deformation ، Heat treatment ، Processing regime