Investigation of deformation mechanisms in textured magnesium alloy

0525523 - ÚJF 2021 RIV CZ eng C - Conference Paper (international conference)
Dittrich, J. - Čapek, J. - Knapek, Michal - Minárik, P.
Investigation of deformation mechanisms in textured magnesium alloy.
METAL 2019 - 28th International Conference on Metallurgy and Materials, Conference Proceedings. Ostrava: TANGER Ltd., 2019, s. 1302-1307. Roč. 1. ISBN 978-80-87294-92-5.
[Metal 2019 - 28th International Conference on Metallurgy and Materials. Brno (CZ), 22.05.2019-24.05.2019]
R&D Projects: GA MŠMT EF16_013/0001794
Institutional support: RVO:61389005
Keywords : magnesium * deformation * twinning * acoustic emission * EBSD
OECD category: Materials engineering

Advanced in-situ and ex-situ methods were used to reveal active deformation mechanisms during deformation of magnesium alloy with a strong texture. Three sets of samples were prepared from the rolled sheet of commercial AZ31 alloy with respect to its strong basal texture - normal direction (ND), rolling direction (RD) and 45 degrees between RD and ND, and were deformed in both compression and tension. The signal of acoustic emission (AE) was measured concurrently during the deformation. Electron backscattered diffraction (EBSD) was used to study the microstructure after the selected stages of the deformation. It is shown that the extension twinning played an important role during the plastic deformation in the samples having favorably oriented basal texture component, whereas in the unfavorably oriented samples, the role of twinning was marginal. Pronounced activation of twinning only in some samples caused a considerable variation in the deformation behavior and AE response. A consistent link between the energy and amplitudes of the AE signal and the microstructure changes investigated by EBSD was established.
Permanent Link: http://hdl.handle.net/11104/0309637