Y alloy

About: Y alloy is a research topic. Over the lifetime, 690 publications have been published within this topic receiving 10223 citations.

Polytypes of long-period stacking structures synchronized with chemical order in a dilute Mg–Zn–Y alloy

Abstract: A series of structural polytypes formed in an Mg–1 at.%Zn–2 at.%Y alloy has been identified, which are reasonably viewed as long-period stacking derivatives of the hexagonal-close-packed Mg structure with alternate AB stacking of the close-packed atomic layers. Atomic-resolution Z-contrast imaging clearly revealed that the structures are long-period chemical-ordered as well as stacking-ordered; unique chemical order along the stacking direction occurs as being synchronized with a local faulted stacking of AB′C′A, where B′ and C′ layers are commonly enriched by Zn/Y atoms.

Dynamic recrystallization of Mg and Mg–Y alloys: Crystallographic texture development

Abstract: Pure magnesium and three binary Mg–Y alloys (023, 084 and 271 wt%Y) have been deformed in plane strain compression under conditions where dynamic recrystallization (DRX) is observed The development of crystallographic texture during deformation has been determined for both the parent and DRX grains In all but the highest Y alloy, the texture of the DRX grains was found to follow that of the parent grains closely in all alloys, implying that the DRX texture is dominated by the deformation conditions, rather than preferred nucleation or growth In the highest Y alloy, the DRX texture is randomized, which also suggests that preferred nucleation or growth is not responsible for texture formation in this alloy A transition in macrotexture development was observed in going from pure Mg deformed at 250 °C, to Mg–271 wt%Y deformed at 450 °C This can be attributed to activation of additional slip modes, and a concomitant decrease in the contribution of twinning to deformation