Hot deformation of Mg-Y-Zn alloy with a low content of the LPSO phase studied by in-situ synchrotron radiation diffraction

0523802 - ÚJF 2021 RIV CN eng J - Journal Article
Fekete-Horváth, Klaudia - Drozdenko, D. - Čapek, J. - Máthis, K. - Tolnai, D. - Stark, A. - Garces, G. - Dobroň, Patrik
Hot deformation of Mg-Y-Zn alloy with a low content of the LPSO phase studied by in-situ synchrotron radiation diffraction.
Journal of Magnesium and Alloys. Roč. 8, č. 1 (2020), s. 199-209. ISSN 2213-9567. E-ISSN 2213-9567
R&D Projects: GA MŠMT EF16_013/0001794
Institutional support: RVO:61389005
Keywords : Magnesium alloy * LPSO phase * kinking * high temperature * synchrotron radiation diffraction
OECD category: Nuclear physics
Impact factor: 10.088, year: 2020
Method of publishing: Open access
https://doi.org/10.1016/j.jma.2019.11.009

The compressive deformation behavior of the extruded WZ42 (Mg98.5Y1Zn0.5 in at.%) magnesium alloy containing a low amount of long-period stacking ordered (LPSO) phase was studied by in-situ synchrotron radiation diffraction technique. Tests were conducted at temperatures between room temperature and 350 degrees C. Detailed microstructure investigation was provided by scanning electron microscopy, particularly the backscattered electron imaging and electron backscatter diffraction technique. The results show that twinning lost its dominance and kinking of the LPSO phase became more pronounced with increasing deformation temperature. No cracks of the LPSO phase and no debonding r at the interface between the LPSO phase and the Mg matrix were observed at temperatures above 200 degrees C. At 350 degrees C, the LPSO phase lost its strengthening effect and the deformation of the alloy was mainly realized by the dynamic recrystallization of the Mg matrix.
Permanent Link: http://hdl.handle.net/11104/0308095