Influence of Volume Fraction of Long-Period Stacking Ordered Structure Phase on the Deformation Processes during Cyclic Deformation of Mg-Y-Zn Alloys

0539483 - ÚJF 2022 RIV CH eng J - Journal Article
Drozdenko, Daria - Farkas, Gergely - Šimko, P. - Fekete, K. - Čapek, J. - Garcés, G. - Ma, D. - An, K. - Máthis, K.
Influence of Volume Fraction of Long-Period Stacking Ordered Structure Phase on the Deformation Processes during Cyclic Deformation of Mg-Y-Zn Alloys.
Crystals. Roč. 11, č. 1 (2021), č. článku 11. ISSN 2073-4352. E-ISSN 2073-4352
R&D Projects: GA MŠMT EF16_013/0001794; GA MŠMT LM2018111
Institutional support: RVO:61389005
Keywords : deformation mechanisms * dislocation slip * EBSD * Mg-LPSO alloys * neutron diffraction * twinning
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 2.670, year: 2021
Method of publishing: Open access
https://doi.org/10.3390/cryst11010011

Deformation mechanisms in extruded Mg-Y-Zn alloys with different volume fractions of the long-period stacking ordered (LPSO) structure have been investigated during cyclic loading, i.e., compression followed by unloading and reverse tensile loading. Electron backscattered diffraction (EBSD) and in situ neutron diffraction (ND) techniques are used to determine strain path dependence of the deformation mechanisms. The twinning-detwinning mechanism operated in the alpha-Mg phase is of key importance for the subsequent hardening behavior of alloys with complex microstructures, consisting of alpha-Mg and LPSO phases. Besides the detailed analysis of the lattice strain development as a function of the applied stress, the dislocation density evolution in particular alloys is determined.
Permanent Link: http://hdl.handle.net/11104/0317217