About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
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Symposium
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Mechanical Response of Materials Investigated through Novel In-situ Experiments and Modeling
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Presentation Title |
Calcium Dependent Twin Type Selection in Texture Weakened Mg Alloys |
Author(s) |
Mohammed Wakib Said, James A.D. Ball, Emily Jenkins, Himanshu Vashishtha, David Collins |
On-Site Speaker (Planned) |
Mohammed Wakib Said |
Abstract Scope |
Despite the excellent strength-to-weight ratio, the poor formability of magnesium alloys has hindered their widespread use. In this investigation, the deformation behaviour of two calcium-containing magnesium alloys was investigated to explore the replacement compatibilities of the commercial Mg-alloy, AZ31. These alloys are particularly exciting as improved ductility is possible, as expected from its weakened basal texture. To elucidate the mechanisms governing this beneficial effect, in-situ high resolution electron backscattered diffraction (HR-EBSD) was performed with uniaxial tensile loading. The method reveals direct observation of twinning, with the associated stress fields before and after their nucleation. Further, polarized light optical microscopy was used to further quantify twin broadening deformed specimens at strain levels inaccessible by HR-EBSD. Moreover, viscoplastic self-consistent (VPSC) modelling was used to explain the relationship between the crystal orientation, twin density and dislocation slip conditions, for alloys containing different Ca concentrations. |
Proceedings Inclusion? |
Planned: |
Keywords |
Magnesium, Modeling and Simulation, Mechanical Properties |