Cyclic Extrusion Compression Process for Achieving Ultrafine-Grained 5052 Aluminum Alloy with Eminent Strength and Wear Resistance

Previous studies have yet to show a consistent effect of severe plastic deformation (SPD) processing on the wear behavior different metals and alloys. To fill this scientific gap, study investigated cyclic extrusion compression (CEC) process, as one prominent SPD techniques, AA5052. In addition, microstructure evolution mechanical properties sample before after process were experimentally examined studied. It was found that yield ultimate tensile strength AA5052 improved significantly first pass, while elongation-to-failure decreased considerably. Further, subsequent passes mildly changed trend increasing reducing elongation-to-failure. SEM morphology indicated ductile mode initial annealed alloy combination brittle failure modes, in which level increased with addition passes. TEM observations showed grain refinement during CEC included formation dislocation cell structures, subgrain boundaries, low-angle boundaries initially evolving into and, eventually, due imposition additional strain, high-angle boundaries. Furthermore, its number led significant improvement resistance enhanced achieved through refinement. regard, mechanism adhesion delamination, bands changing plowing adhesive process. Eventually, oxidization be contributing under all conditions.