Experimental and Numerical Analyses of the Consolidation Process of AA 7075–2 wt.% ZrO2 Powders by Equal Channel Angular Pressing
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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.
Keywordsaluminum alloys metallic matrix composites powder metallurgy
Academic and financial support by the Universidad Autónoma de San Luis Potosi and CONACYT is appreciated. One of the authors (JLHR) gratefully recognizes the financial support from FAI-UASLP under the Project CI5-FAI-04-45.45 and acknowledges CONACYT for the economic support for the acquisition of the DEFORM 3D software under the institutional program “Cátedras CONACYT 2014” under Project Number 2198. A special acknowledgment is extended to Claudia Guadalupe Elias, Rosalina Tovar, and Manuel Gutierrez from Universidad Autónoma de San Luis Potosí for their technical assistance.
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