Prediction of strain gradient hardening during microextrusion
A new formulation is presented to predict the strain distribution through the thickness of the workpiece during forward extrusion. By using shear components, a new model is established to estimate the geometrically necessary dislocation density, which is found to increase with a decrease in the initial and final specimen diameters and an increase in the die angle. Also, strain gradient hardening during forward microextrusion is predicted according to the calculated geometrically necessary dislocation (GND) density. It is found that to experience a significant amount of strain gradient hardening, the diameter of the material should be on the order of 400 mu m or less.
Materials and Manufacturing Processes
TAYLOR & FRANCIS INC
Digital Object Identifier (DOI)
Parasiz, Sunal Ahmet and Kinsey, Brad L., "Prediction of strain gradient hardening during microextrusion" (2010). Materials and Manufacturing Processes. 12.
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