About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
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Symposium
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Dynamic Behavior of Materials IX
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Presentation Title |
Spall Failure of ECAE-processed Mg-6Al via Laser-driven Micro-flyer Impact Experiments |
Author(s) |
Christopher Dimarco, Debjoy Mallick, Chengyun Miao, David Gibbins, Jenna Krynicki, Nathaniel Davenport, Laszlo Kecskes, Tim Weihs, K.T. Ramesh |
On-Site Speaker (Planned) |
Christopher Dimarco |
Abstract Scope |
Magnesium alloys have been proven to achieve a high specific strength when processed via traditional strengthening mechanisms. This makes them prime candidates for protection-based applications. However, they suffer from low failure strains, which translates to poor dynamic performance. To the spall strength, recent dynamic impact experiments on rolled Mg-9Al examined the effects of a strong basal texture, large grains, and high aspect ratio lath precipitates on the spall strength. Herein, we examine a similar binary alloy system (Mg-6Al), but with a lower aluminum content and processed via Equal Channel Angular Extrusion (ECAE). The resulting microstructure consists of a reduced grain size, finer and more equiaxed precipitates, and a larger dislocation density. These experiments utilize laser-driven micro-flyer techniques that facilitates high-throughput capabilities (i.e. meaningful statistics). We show the results of the spall strength as a function of material strain rate and loading direction and compare them with Mg-9Al results. |
Proceedings Inclusion? |
Planned: |
Keywords |
Magnesium, Mechanical Properties, Other |