بررسي ريزساختاري و خواص مكانيكي آلياژ آلومينيوم 6061 توليد شده به روش تف‌جوشي پلاسماي جرقه‌اي (SPS)

In this study, the microstructural evolution an‎d mechanical properties of AA6061 aluminum alloy fabricated via spark plasma sintering (SPS) were investigated. The selec‎tion of powder metallurgy for producing this alloy was motivated by its advantageous characteristics, including lower energy consumption, cost-effectiveness, an‎d shorter processing times compared to conventional melting an‎d casting routes. The investigation was conducted on chips obtained from AA6061 aluminum alloy sheets. Characterization was performed using densitometry, X-ray diffraction (XRD), optical microscopy (OM), scanning electron microscopy (SEM), hardness testing, as well as tensile, wear, compression, an‎d bending tests. Through design of experiments using Minitab software, the optimal processing parameters were determined as a sintering temperature of 450 °C, a pressure of 15 MPa, an‎d a holding time of 5 min. For the optimized sample, densitometry, hardness, an‎d compression tests yielded values of 98.89% of theoretical density, 116 HV, an‎d a compressive strength of 688 MPa, respectively. Optimal results were also observed in wear resistance testing an‎d microstructural examination. Maximum tensile an‎d flexural strengths of 115 MPa an‎d 270 MPa were recorded in the tensile an‎d bending tests, respectively. The findings confirmed that the alloy produced by this route exhibits favorable properties, demonstrating that spark plasma sintering is a suitable method for the fabrication of AA6061 aluminum alloy.

رضا اميني نجف آبادي

مصطفي ميلاني

تقي اصفهاني , مهدي رفيعايي