Tensile properties of Al–Fe alloys prepared by mechanical alloying with C60

Abstract

The aluminum, of which the recovery was retarded by the addition of solute iron, was mechanically alloyed with C60 or graphite, hot pressed at 400°C or 500°C, extruded at 400°C, and then tensile tested at the room temperature. The added amount of C60 or graphite is 5% at the volume fraction, and the iron concentration is 0.5 mass%. In the case of C60, the tensile strength rises from 120 MN/m² to 170 MN/m², while the elongation decreases from 44% to 5%. When the graphite is added, the tensile strength hardly changes and the elongation decreases to 4%. The main cause of the increase in strength by addition of C60 is discussed to be the dispersion-hardening brought about by Al₄C₃ particles which were formed by decomposition of C60.