Abstract
Long period stacking ordering (LPSO) significantly enhances the mechanical properties of magnesium alloys. Herein, for the first time, the effect of thermo-mechanical processing on the transformation of the LPSO during multi-axial forging at 400 degrees C has been addressed.
Interestingly, a considerable growth of the lamellar LPSO from blocky phase and the transformation of blocky LPSO to Mg5Gd are recognized as a deformation-assisted evolutions. Covering the grains by the lamellar LPSO after 3 MAF passes is quite surprising, owing to short-time preheating/heating and relatively low temperature.
It is justified through the development of (i) high-track diffusion and (ii) proper original grain orientation for propagation of LPSO lamellae, stemming from large imposed strain through MAF process. (C) 2020 Elsevier B.V. All rights reserved.