|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Ultrafine-grained Materials X
||The Influence of Microstructure Characteristics on Plastic Deformation Mechanisms in Severely Deformed Aluminium
||Witold Chrominski, Malgorzata Lewandowska
|On-Site Speaker (Planned)
Severe plastic deformation techniques are applied to metals to increase grain boundaries content in their microstructure. Various texture components and characteristics of grain boundaries can be obtained depending on the imposed strain and deformation route. This can lead to variances of plastic deformation mechanisms observed at the local scale. In this study, technically pure aluminium was subjected to hydrostatic extrusion at two levels of strain and incremental equal channel angular pressing to produce material with different combinations of grain sizes, misorientation angle distributions and texture. Such samples were then compressed for mechanical properties evaluation. Post deformation EBSD/TEM observations were performed in order to investigate changes in the microstructure in relation to pre-deformation condition. To explain the observed differenced, an in-situ TEM straining experiments were done to follow intermediate stages of deformation structures evolution. These observations were compared to post mortem investigations to conclude operative deformation mechanisms at the local scale.
||Planned: Supplemental Proceedings volume