Texture weakening and static recrystallization in rolled Mg–2.9Y and Mg–2.9Zn solid solution alloys

Role of RE in the deformation and recrystallization of Mg alloy and a new alloy design concept for Mg–RE alloys

“…It has been suggested that this segregation is responsible for the strong suppression of dynamic recrystallization (DRX) in Mg-Y alloys [18]. This may be related to the findings of Stanford et al [3,19,20], who suggested that dislocation/solute interactions can play an important role in texture weakening.…”

“…In addition to PSN, precipitation in the Mg matrix and GBs can influence dislocation and GB movement (pinning effect) during deformation and recrystallization, which can in turn influence the texture development of Mg [7,30]. However, recent studies for Mg-Zn-Y [18,31] and Mg-Zn-Ce [2,32] with different kinds and amounts of ternary RE compounds show no significant change in texture due to precipitates. Therefore, RE precipitates seem to be less effective than RE segregation to GBs or dislocations.…”

Different annealing behaviours of warm rolled Mg–3Al–1Zn alloy sheets with dynamic recrystallized microstructure and deformation microstructure

“…However, in general, annealing cannot change the basal texture markedly and even tends to result in a disappearance of basal pole inclination for conventional Mg alloy sheets [8][9][10]. Although some work has been devoted to the elucidation of their annealing behaviours [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22], there is still a lack of understanding of the underlying physical processes that control microstructural and textural evolution during annealing due to the complexities of this phenomenon. The understanding of the mechanism of texture evolution during post-deformation annealing would provide useful information to design an optimal processing route for achieving Mg alloy sheets with superior formability.…”

Atomic-scale investigation of creep behavior in nanocrystalline Mg and Mg–Y alloys

“…The improvement in mechanical behavior reported to be due to some combination of the following phenomena: the activation of <c+a> dislocations [11,20,21,42], forest dislocation hardening [18], inhabitance of the static recrystallization [14], and formation of an enhanced oxide film [43,44]. In this paper, we reveal and elucidate the high-temperature deformation behavior and mechanisms of nanocrystalline magnesium with and without yttrium for a temperature range of 573 K to 723 K under constant stress loadings.…”

“…Since magnesium has a hexagonal close packed (hcp) structure, it has a limited number of active slip systems at room temperature [8,9] which leads to failure in polycrystalline Mg-alloys at ambient conditions before dislocation glide can occur [10][11][12]. In an effort to overcome these low strength shortcomings, recent studies have considered the effects of adding certain alloying elements to magnesium, such as Al-Zn, Al-Si, Al-Ca, Al-Sr, Sn-Ca, Zr-Y, and minute traces of other rare-earth (RE) elements [6,[13][14][15][16][17][18][19][20][21][22][23]. The objective of all these studies has been to qualitatively identify the principles governing solute and precipitate strengthening and ductility while improving manufacturability, as well as lowering production costs of the alloys (e.g., [17,24]).…”