In order to perform the tensile tests, Santam STM-150 universal apparatus with a 50 kN load cell was employed. The machine was run under displacement control mode at a crosshead speed of 1.0 mm/min. The strain data was obtained using an extensometer of 50 mm gauge length. Prior to the tensile test, all the samples were mechanically polished to minimize the influence of surface flaws, especially the porosity.