| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Magnesium Technology
|
| Presentation Title |
E-21: Mechanical and Microstructural Behavior of Rolled AZ31B Magnesium Alloy Subjected to Multiaxial Stress State |
| Author(s) |
Luiz Alberto Carneiro, Qin Yu, Yanyao Jiang |
| On-Site Speaker (Planned) |
Luiz Alberto Carneiro |
| Abstract Scope |
The deformation of rolled AZ31B magnesium alloy was experimentally investigated under multiaxial loading. Specimens are prepared with their longitudinal axis oriented parallel to the normal direction of the rolled plate. Multiaxial tension-torsion and compression-torsion tests are conducted with different ratios of maximum axial strain to maximum shear strain. The results show that axial yield and flow stresses decrease with the introduction of simultaneous shear. The shape of the shear stress-shear strain curve is significantly affected by the multiaxial loading. The shear stress-shear strain curves display a strong sigmoidal shape under tension-torsion, while a concave-down shape is observed under compression-torsion. Post-fracture microstructural analysis shows that a significant fraction of the grains with negative resolved shear stress on the {10-12} planes display {10-12} tension twins under compression-torsion, indicating that Schmid criterion alone may not explain twin favorability. The fracture damage mechanisms are also discussed in terms of possible crack initiation sites. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Magnesium, Other, Other |