High temperature tensile mechanical properties and microstructure of extruded 6082-T6 aluminum alloy
Effects of deformation temperature and strain rate on high-temperature tensile mechanical properties of extruded 6082-T6 aluminum alloy were studied using a Gleeble3500 thermal simulation testing machine.Microstructure evolution of the alloy during high-temperature tensile was analyzed using optical microscope(OM),scanning electron microscopy(SEM)and transmission electron microscopy(TEM).The results show that at a constant strain rate,the tensile strength of the extruded 6082-T6 aluminum alloy decreases with the increase of tensile temperature.At a constant tensile temperature,its tensile strength increases with the increase of strain rate.The extruded 6082-T6 aluminum alloy exhibits ductile fracture under high temperature(300-450 ℃)tensile conditions.At higher deformation temperatures and lower strain rates,the dimples of the alloy increase and become deeper,exhibiting good plasticity.During the high-temperature deformation process,as the tensile temperature increases,the dislocation density inside the alloy decreases,and there is a coarsening phenomenon of precipitates,resulting in a decrease in the deformation resistance of the alloy.
6082-T6 aluminum alloyhigh temperature tensilemicrostructuremechanical property
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