An enhanced crystal-plasticity finite-element model is developed to model the effects of texture,
grain size and loading direction on asymmetrical tension-compression behaviour of AM30
magnesium alloy. A constitutive description of plastic deformation in the suggested scheme
accounts for contributions from deformation slip and twinning. The calibrated model was
employed to investigate the effects of texture and grain size on the yield stress and strain- -
hardening behaviour of AM30 magnesium alloy at room temperatures under various loading
conditions. The study reveals that grain refinement and initial texture significantly influence
the mechanical behaviour of AM30. Results show that the key factor controlling the tension compression asymmetry is deformation twinning. Two techniques, which could be used to
reduce this asymmetry, are grain refinement and weakening of the initial texture in extruded
AM30.
Funding
Funding from the Engineering and Physical
Sciences Research Council (UK) through grant EP/P027555/1, project H 2 Manufacturing, is
gratefully acknowledged
History
School
Mechanical, Electrical and Manufacturing Engineering
Published in
Computational Materials Science
Citation
ZHOU, R., ROY, A. and SILBERSCHMIDT, V.V., 2019. A crystal-plasticity model of extruded AM30 magnesium alloy. Computational Materials Science, 170, 109140.
This work is made available according to the conditions of the Creative Commons Attribution 4.0 International (CC BY 4.0) licence. Full details of this licence are available at: http://creativecommons.org/licenses/by/4.0/
Acceptance date
2019-07-14
Publication date
2019-07-24
Copyright date
2019
Notes
This is an open access article under the CC BY license (http://creativecommons.org/licenses/BY/4.0/).