Thermal softening during high-temperature torsional deformation of aluminum bars

2018/11/28 by Khanh Chau Le, Le, Khanh Chau, Yinguang Piao +1
Engineering · Materials Science · #Aluminum Alloys Composites Properties #FOS: Physical sciences #High-Velocity Impact and Material Behavior #Materials Science (cond-mat.mtrl-sci) #Microstructure and mechanical properties #Soft Condensed Matter (cond-mat.soft)

paper · pdf · doi:10.48550/arxiv.1811.11500

openalex publication_date 2018/11/28 · openalex created_date 2019/06/27 · openalex updated_date 2026/07/28

Abstract

A simple extension of the thermodynamic dislocation theory to non-uniform plastic deformations is proposed for an analysis of high-temperature torsion of aluminum bars. Employing a small set of physics-based parameters, which we expect to be approximately independent of strain rate and temperature, we are able to fit experimental torque-twist curves for five different twist rates and at one fixed ambient temperature. We find that thermal softening due to temperature rise is significant at high twist rates.

Citations

• Physics and phenomenology of strain hardening: the FCC case

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