Journal
MATERIALS TRANSACTIONS
Volume 64, Issue 4, Pages 730-734Publisher
JAPAN INST METALS & MATERIALS
DOI: 10.2320/matertrans.MT-MD2022018
Keywords
long-period stacking ordered (LPSO) phase; deformation kink band; local hardness; equal-channel angular extrusion (ECAE)
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Mg-9 at%Y-6 at%Zn and Mg-2 at%Y-1 at%Zn alloys were processed by equal-channel-angular extrusion (ECAE) to investigate their microstructure evolution and local hardness. The area fraction of the kink bands in the Mg-9 at%Y-6 at%Zn alloys increased with increasing the number of ECAE passes, resulting in higher hardness. In the Mg-2 at%Y-1 at%Zn alloys, the microstructural evolution of the alpha-Mg matrix phase and long-period stacking ordered (LPSO) phase by 1-pass ECAE and the increase in local hardness were discussed.
Mg-9at%Y-6 at%Zn and Mg-2at%Y-1 at%Zn alloys were processed by equal-channel-angular extrusion (ECAE) to investigate their microstructure evolution and local hardness. The area fraction of the kink bands in the Mg-9 at%Y-6at%Zn alloys increased with increasing the number of ECAE passes, resulting in higher hardness. In contrast, the number of kink boundaries in the local region near the indentation was almost constant. The relationship between the microstructure factors of the kink bands and the local hardness is discussed in comparison with the forged alloy. In the Mg-2 at%Y-1at%Zn alloys, the microstructural evolution of the alpha-Mg matrix phase and long-period stacking ordered (LPSO) phase by 1-pass ECAE and the increase in local hardness were discussed.
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