About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
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Ultrafine-grained and Heterostructured Materials (UFGH XI)
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Presentation Title |
Heterogeneities in Plastic Deformation Mechanisms in UFG Aluminum Studied by In-situ TEM Straining and Bulk Deformation |
Author(s) |
Witold Chrominski, Malgorzata Lewandowska |
On-Site Speaker (Planned) |
Witold Chrominski |
Abstract Scope |
Understating of the plastic deformation behaviour in UFG metals is necessary for the development of industrial routines for tooling of such metals. For this reason, detailed TEM study on deformation mechanisms behind macroscopic plastic deformation were utilized. The emphasis was laid on how local defects arrangements, including type of grain size and boundaries characteristics, impact dislocation glide. Firstly, heterogenous materials with similar double-texture components but different grain size and boundary distribution were studied. Then, samples with a relatively uniform microstructure were investigated. Once plastic deformation in nanoscale was described, these observations were transferred to a bulk deformation. A new set of samples taken from the same materials were studied before and after bulk compression test. Comparison of pre- and post-deformation microstructures allowed to deduce an effect of previously detected small-scale mechanisms on a more global behavior of such samples. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume; Planned: Supplemental Proceedings volume |