Powder Metallurgy · 1972 · 28 citations · 2 references
Natural SciencesMaterials EngineeringMaterials ScienceMaterials CharacterizationMaterials ProcessingMechanical Behavior Of MaterialsAlloysDuctilityExtrusion ProcessingMaterial ExtrusionMicrostructure ControlPowder ProcessingAluminium AlloysAluminum ExtrusionsExtrusionExtrusion PropertiesMesh SizePowder Metallurgy ProcessingScanning Electron Microscopy
More than a hundred experiments have been performed to investigate the extrusion mechanism involved and the effect of process variables on the structure, substructure, and mechanical properties of the extrude when processing atomized aluminium powder of varying mesh size. It is demonstrated that extrusion pressure is largely independent of the final properties and that the ductility of the extrude may be controlled by the process variables. A mechanism that agrees with experimental observations is suggested to explain the extrusion mechanics. Transmission and scanning electron microscopy results also support the theses presented.
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