Procedia Engineering · 2011 · 19 citations · 20 references
EngineeringMultiscale MechanicsSevere Plastic DeformationMechanical EngineeringAluminum Alloy Hs6061-t6Mechanics ModelingMechanicsChannel AngleStressstrain AnalysisMicrostructure-strength RelationshipDeformation ModelingMaterials ScienceSound Ecap DieFem SimulationsMechanical BehaviorEcap PassesSolid MechanicsMaterial MechanicsPlasticityMetal FormingMechanical DeformationMicrostructurePlastic DeformationMechanical PropertiesMaterial ModelingMechanics Of MaterialsHigh Strain Rate
The knowledge of deformation behavior and strain homogeneity is essential to design a sound ECAP die. Thus, the current study dealt with the influence of channel angle on the deformation behavior and strain homogeneity in ECAP by conducting finite element simulations with COSMOS for a range of channel angles along with the consideration of strain hardening of the material and friction. Complicated and smooth deformation behaviors are observed with φ<110° and φ≥110°, respectively. Effective strain variation across the width at the centre of the sample showed that strain homogeneity is greater with φ=110° compared to the other channel angles. The effective plastic strain index of inhomogeneity decreased with the number of ECAP passes. From the experimental and FEM results, φ=110° and 130° was found to give higher homogeneity than φ=70° and 90°.
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