| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
|
| Presentation Title |
Experimental Analysis and Numerical Simulation of Cyclic Deformation and Fatigue Behavior of AZ31 Mg Alloy |
| Author(s) |
Abbas Jamali, Meijuan Zhang, Anxin Ma, Javier Llorca |
| On-Site Speaker (Planned) |
Javier Llorca |
| Abstract Scope |
The mechanical response and the low cycle fatigue behavior under fully-reversed cyclic deformation was determined in different orientations in an extruded AZ31 Mg alloy for different cyclic strain amplitudes. The shape of the cyclic stress-strain curves depended on the orientation due to the strong texture of the alloy and to the development of twinning under certain combinations of load and orientation. The mechanical response of the material under cyclic deformation was simulated by means of computational homogenization of a representative volume element of the microstructure of the alloy, The behavior of the Mg crystals followed a phenomenological crystal plasticity model which included all the different slip systems of Mg (basal, prismatic and pyramidal) as well as twinning and detwinning. The simulation results (in terms of the cyclic stress-strain curve and fraction of twinned material) were used to understand the micromechanisms controlling the fatigue life of Mg alloys. |
| Proceedings Inclusion? |
Planned: |