Optimization of Process Parameters in Spark Plasma Sintering Al6061 and Al2124 Aluminum Alloys
In the present study, Al2124 and Al6061 alloys were consolidated through spark plasma sintering at 400, 450 and 500 °C using three different combinations of pressure and time (35 MPa - 20 min, 40 MPa - 15 min and 45 MPa - 10 min). The microstructure, density and hardness of sintered samples were evaluated. Full densification and the highest hardness were obtained at 450 °C. Beyond 450 °C, there was only small change of hardness. Densification of specimens was less sensitive to the applied pressure. However, the lowest pressure of 35 MPa led to the highest hardness. At higher temperatures, the increase in pressure resulted in grain growth which decreased the hardness.
Liangchi Zhang, Chunliang Zhang and Zichen Chen
A. Khalil et al., "Optimization of Process Parameters in Spark Plasma Sintering Al6061 and Al2124 Aluminum Alloys", Advanced Materials Research, Vols. 328-330, pp. 1517-1522, 2011