Pyramidal II to basal transformation of ⟨c + a ⟩ edge dislocations in Mg-Y alloys
Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review
Author(s)
Detail(s)
Original language | English |
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Pages (from-to) | 114-118 |
Journal / Publication | Scripta Materialia |
Volume | 155 |
Online published | 23 Jun 2018 |
Publication status | Published - Oct 2018 |
Externally published | Yes |
Link(s)
Abstract
Transitions of pyramidal ⟨c + a ⟩ dislocations to sessile structures contribute to poor ductility in pure Mg. Mg-3 wt% Rare Earth (RE) alloys have good ductility, possibly due to ⟨c + a ⟩ dislocation stabilization upon addition of RE solutes. Here, ⟨c + a ⟩ stability is investigated in a model Mg-3 at.%Y random solid solution alloy using molecular dynamics simulations. Favorable fluctuations of Y solutes lower all dislocation energies and have no appreciable effects on the transition mechanism, energy barrier, or time. Enhanced ⟨c + a ⟩ activity and improved ductility in Mg-3 wt%RE alloys are thus not likely associated with solute-stabilization of pyramidal ⟨c + a ⟩ dislocations.
Research Area(s)
- MEAM potentials, Mg-Y alloy, Molecular dynamics simulations, ⟨c + a⟩ dislocations
Citation Format(s)
Pyramidal II to basal transformation of ⟨c + a ⟩ edge dislocations in Mg-Y alloys. / Ahmad, Rasool; Wu, Zhaoxuan; Groh, Sébastien; Curtin, W. A.
In: Scripta Materialia, Vol. 155, 10.2018, p. 114-118.Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review