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High‐temperature torsion of aluminum bars
Author(s) -
Piao Yinguang,
Le Khanh Chau
Publication year - 2019
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201900005
Subject(s) - twist , torsion (gastropod) , softening , torque , aluminium , materials science , thermal , torsion spring , dislocation , torsion pendulum clock , condensed matter physics , thermodynamics , physics , mechanics , classical mechanics , composite material , geometry , mathematics , quantum mechanics , medicine , surgery
This paper studies high‐temperature torsion of aluminum bars within the simplified thermodynamic dislocation theory that ignores the excess dislocations. Employing a small set of physics‐based parameters, we are able to fit experimental torque‐twist curves for five different twist rates. The thermal softening effect is shown to be essential at high twist rates.