Extrudability and mechanical properties of Al-Mg-Si alloys

Abstract

Listen

Translate article

Al-Mg-Si alloys of various chemical compositions were extruded at various temperatures, and extrudability and mechanical properties of extruded or annealed rods were examined.The following results were obtained.(1) Extrusion pressure was higher with the excess of Mg content over Mg2Si. When Cu and Fe contents increased, the extrusion pressure was higher.(2) The mechanical properties of Al-Mg-Si alloys extruded at 440°C were indifferent to Mg and Si contents. However, when they were extruded at 520°C, hardness, 0.2% yield strength, and tensile strength were higher with the increase in Mg and Si contents. The mechanical properties of the extruded rods were more improved with the increase in Cu content, but the improvement was little for the rods extruded at 520°C with the increase in Fe content.(3) The mechanical properties of Al-Mg-Si alloys extruded at 520°C were improved by annealing at 175°C for 3 hrs. with the increase in Mg and Si contents, but the improvement was not seen by annealing at 230°C for 1 hr. in spite of the increase in the both contents.Cu improved mechanical properties of annealed rods, but Fe slightly improved them by annealing at 175°C for 3 hrs.