|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Mechanical Behavior of Nanostructured Materials
||L-135: Multi-stages Spiral Twist Extrusion: A Novel Severe Plastic Deformation Technique for Bulk Nanostructured Materials
||Waleed Hassan El-Garaihy, Dina Fouad, Hanadi Salem
|On-Site Speaker (Planned)
In this study, an innovative technique of severe plastic deformation named Multi-stages Spiral Twist Extrusion (MSTE) was designed to produce bulk nanostructured materials (BNM). The principle of MSTE was adopted to guarantee shear strain accumulation within a square cross-section workpiece without undergoing dimensional or shape change. The induced total effective strain via MSTE is a function of the length of the twist extrusion zone, the die slop angle, the angle of the outlet zone relative to the twist angle and the number of passes. Accordingly, MSTE is capable of producing ultrafine nanoscale structure with variable texture. In an attempt to evaluate the cumulative strain associated with MSTE for different alloy rods with variable cross-sectional areas are processed at different deformation temperatures and strain rates. Evaluation and validation of the novel process is conducted via series of investigation of the mechanical behavior and structural evolution before and after processing.
||Planned: Supplemental Proceedings volume