About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Mechanical Behavior at the Nanoscale VII
|
Presentation Title |
On the Anisotropy of Dynamic Strain Aging (DSA) Mediated Serrated Flow |
Author(s) |
Henry Ovri |
On-Site Speaker (Planned) |
Henry Ovri |
Abstract Scope |
DSA mediated serrated flow is typically observed across length scales that span the macro-, meso- and submicron-scales. This allows for direct correlations between its macroscopic manifestations and the underlying micromechanisms. Nonetheless, the phenomenon has been primarily studied at the macron scale. Consequently, important aspects, like the influence of plastic anisotropy and twinning on the phenomenon are yet to be understood. Insights into these aspects require the testing of mono-crystals with a combination of microcompression and TEM based measurement. These techniques were employed in this work on pure Mg and a Mg-Gd alloy monocrystals, oriented for twinning and slip on different planes. These material systems were partly chosen because Mg shows strong plastic anisotropy and serrated flow occurs in Mg-Gd alloys during deformation at elevated temperature. The work unambiguously show that serrated flow is strongly anisotropic; differences in the Burgers vector magnitude and the directionality of impurity diffusion promote the anisotropy. |
Proceedings Inclusion? |
Planned: |
Keywords |
Magnesium, Characterization, Mechanical Properties |