About this Abstract |
Meeting |
2023 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 |
On the Deformation Mechanisms of Ductility Enhanced Mg-X-Ca Alloys at Elevated Temperatures |
Author(s) |
Mohammed Wakib Said, David Collins |
On-Site Speaker (Planned) |
Mohammed Wakib Said |
Abstract Scope |
Magnesium alloys are lighter than commonly used structural materials, particularly for automotive applications, although poor formability at room temperature has hindered their widespread commercial use. Wrought magnesium alloys experience anisotropy due to; a strong basal crystallographic texture and dislocation motion mostly constrained to basal slip. This study explores prototype Ca-containing magnesium alloys, where the addition weakens the basal texture and improves ductility, however, the governing microplasticity processes are broadly unexplored. These alloys were investigated using in-situ synchrotron diffraction during tensile testing at forming relevant temperatures to reveal micromechanical evolution. This enabled texture and lattice strains development, related to a temperature dependency of non-basal slip, to be explored. The measurements have enabled key parameters including critical resolved shear stress and slip activation energy barriers to be determined, as a function Ca level. This approach, combined microscopy including EBSD, show significant slip activity differences when benchmarked against the commercial AZ31 Mg alloy. |
Proceedings Inclusion? |
Planned: |
Keywords |
Magnesium, Mechanical Properties, Characterization |