About this Abstract |
Meeting |
12th International Conference on Magnesium Alloys and their Applications (Mg2021)
|
Symposium
|
12th International Conference on Magnesium Alloys and their Applications (Mg 2021)
|
Presentation Title |
Cyclic Deformation Mechanisms and Fatigue Life Prediction of AZ31 Mg Alloy |
Author(s) |
Abbas Jamali, Meijuan Zhang, Anxin Ma, Javier Llorca |
On-Site Speaker (Planned) |
Javier Llorca |
Abstract Scope |
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 cyclic deformation mechanisms and to predict the fatigue life from fatigue indicator parameters. |
Proceedings Inclusion? |
Planned: At-meeting proceedings |