Prediction of strain gradient hardening during microextrusion
Abstract
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.
Department
Mechanical Engineering
Publication Date
9-2-2010
Journal Title
Materials and Manufacturing Processes
Publisher
TAYLOR & FRANCIS INC
Digital Object Identifier (DOI)
10.1080/10426910903130024
Document Type
Article
Recommended Citation
Parasiz, Sunal Ahmet and Kinsey, Brad L., "Prediction of strain gradient hardening during microextrusion" (2010). Materials and Manufacturing Processes. 12.
https://scholars.unh.edu/mecheng_facpub/12
Rights
Copyright © 2010, Taylor and Francis