Experimental and Numerical Analyses of the Consolidation Process of AA 7075–2 wt.%25 ZrO2 Powders by Equal Channel Angular Pressing

AA7075 matrix composite was obtained by mechanical alloying using ZrO2 particles as reinforcement. After that, the powders were cold-compacted into an aluminum tube and consolidated by equal channel angular pressing at 220 °C. The temperature influence was analyzed, and it was found by scanning electron microscopy that this route gave the minimum pore percentage. Besides, it was noticeable that the hardness was wide superior in comparison with the AA 7075 aged bulk alloy. In addition, there was no evidence of any chemical reaction between ZrO2 and alloying elements at the temperature employed. On the other hand, it was numerically and experimentally demonstrated that the more strained regions exhibited a higher relative density values. © 2018, ASM International.

aluminum alloys; metallic matrix composites; powder metallurgy Alloying elements; Aluminum alloys; Aluminum powder metallurgy; Grain size and shape; Mechanical alloying; Metallic matrix composites; Powder metallurgy; Powders; Pressing (forming); Scanning electron microscopy; Zirconia; Zirconium alloys; Aluminum tubes; Bulk alloys; Consolidation process; Experimental and numerical analysis; Matrix composite; Relative density; Temperature influence; Equal channel angular pressing

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