Vacuum Treatment of Prealloyed Aluminum Powders at Moderate Temperatures.

摘要

The objective was to determine if treating coarse,highly alloyed aluminum powder (Al-Zn-Mg-Cu plus Co or Zr) at moderate temperatures under relatively high vacuum would yield ductile wrought alloys at strength levels of 100ksi. Canned,green compacts of -100+325mesh power were heated at 600F and 700F;evacuated;sealed;hot compacted; decanned and extruded at a 8.5:1ratio into 1.5-in. diameter rod. Longitudinally the extrusions were strong and ductile. The transverse ductility was poor due to insufficient deformation during extrusion and porosity not eliminated by the vacuum treatment. It is expected that further study of the process variables would yield the techniques required to obtain high transverse strength and ductility. (Modified author abstract)