SURFACE FRACTURE MODE OF RECYCLING ALUMINUM 6061 CHIPS BY THE HOT EXTRUSION PROCESS
Abstract
Among the studies that are being carried out is to occupy recycled aluminum as the main material for the production of non ferrous metal. Aluminum AA6061 chip metals were extruded by hot extrusion and the effect of extrusion parameters on the tensile properties and fracture behavior were investigated. Extrusion is a forming operation that uses a hydraulic ram to force heated raw supplied material, in the form of large diameter cylindrical logs, through a die land that is the desired product shape. The quality of the extruded product is influenced by the extrusion temperature, preheat temperature and extrusion speed. Tensile test results showed that material extruded using temperature 400°C exhibit lower mechanical properties compared with temperature of 550°C. The sample’s physical properties are investigated using the tools available in the laboratory. There have two types of fracture are brittle fracture and ductile fracture. Fracture surfaces shown that ductile fracture mode occurred at condition 500°C and 2 hours, and brittle fracture occurred at condition 400°C.
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