Activation of pyramidal II <c+a> slips at room temperature in Mg-Zn-Y 18R and 14H long-period stacking ordered phases
Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review
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Detail(s)
Original language | English |
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Article number | 107225 |
Journal / Publication | Intermetallics |
Volume | 135 |
Online published | 11 May 2021 |
Publication status | Published - Aug 2021 |
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Abstract
The 18R and 14H long-period stacking ordered (LPSO) phases were generally considered that only the basal and non-basal <a>slips and kink banding could be activated during quasi-state deformation at room temperature. Here, we confirm that the pyramidal II <c+a> slips can also be activated in the 18R LPSO phase by quasi-state nanoindentation and in the 14H LPSO phase by cold roll with a rolling direction parallel to the (0001) plane. Due to the interaction between the Zn6Y8 atomic clusters in the LPSO phases and the pyramidal II <c+a> dislocations, the pyramidal II slips are localized in the well-defined slip bands while the chemically ordered structure of Zn6Y8 atomic clusters is disrupted to be disordered. Additionally, the interaction also induces Zn/Y atoms segregation at the two edges of the slip band. Our results unravel the origin for the excellent room temperature plasticity in the LPSO phases.
Research Area(s)
- Mg alloy, Intermetallics, Long-period stacking ordered phase, Deformation microstructure, Pyramidal II <c+a> slip, Electron microscopy
Citation Format(s)
Activation of pyramidal II <c+a> slips at room temperature in Mg-Zn-Y 18R and 14H long-period stacking ordered phases. / Li, Wanpeng; Liu, Cuixiu; Liu, Linlin et al.
In: Intermetallics, Vol. 135, 107225, 08.2021.Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review