Effect of Homogenization Condition on the Mechanical Properties and Peripheral Coarse Grain (PCG) in AA2014 Alloys
摘要
AA2014AA2014 is a high-strengthStrength heat treatable alloy which is frequently used for aerospace and defence applications. AA2xxx alloys when extruded through direct extrusionExtrusion process and followed by solution heat treatmentHeat treatment suffer from abnormal grain growthAbnormal grain growth at the periphery of the extrusionExtrusion section. This defect is termed as Peripheral Coarse Grain (PCGPeripheral Coarse Grain (PCG)) industrially and it is a persistent problem. However, the extent of PCGPeripheral Coarse Grain (PCG) can be reduced or eliminated by control of extrusionExtrusion process parametersProcess parameter as well as the input composition of the alloy. In this study, the homogenizationHomogenization practice of this alloy is varied to study its effect on PCGPeripheral Coarse Grain (PCG) and mechanical propertiesMechanical properties. The dispersoidsDispersoids density and size distribution is investigated for two different homogenizationHomogenization heat treatmentsHeat treatment using SEM and these are correlated with the mechanical propertiesMechanical properties.