Influence of Y and Nd on microstructure, texture and anisotropy of Mg–5Li–1Al alloy

Microstructure and mechanical properties of LA51 and LA51–0.5Y alloys with different accumulated strains and rolling temperatures

“…2(a), there exist some small compounds distributing along the grain boundaries and within the grains. According to the previous research [7], the secondary phase is Al 2 Y. After rolling, the Al 2 Y becomes finer and more dispersive, and coarse grains exhibit a tendency to convert into tiny equiaxed grains.…”

“…According to Bohlen et.al [19], wrought (0002) (a) (0002) (b) (0002) (c) magnesium alloys usually exhibit strong basal texture because of the HCP structure, while adding RE in the magnesium alloy, the texture weakens and presents a certain random. PSN (particle stimulate nucleation) mechanism is the main reason, which influences the microstructure and mechanical properties of the LA51-0.5Y alloys [7]. The granular Al 2 Y compounds can provide more approaches for nucleation and promote the occurrence of DRX, thus weakening the basal texture and accelerating the formation of non-basal texture of the alloy, as shown in Fig.…”

“…Literatures have shown that yttrium can refine the grains and enhance the mechanical properties of Mg-Li alloys [6][7][8]. Dong et al [6] prepared and investigated the characterization of Mg-6Li and Mg-6Li-1Y alloys, of which the results show that the strengthening effects of Mg-6Li-1Y alloy are attributed to the solid solution strengthening and precipitation hardening that are both introduced by Y. Zhu et al [7] indicated that the addition of Y changes the stacking fault energy of magnesium alloy, resulting in the scattered texture distribution and higher elongation of the sheet. Wu et al [8] also reported that, while Y is added into LA81 and LA83 alloys, the strength and elongation both improve.…”

“…As for LA51 alloy, previous literatures mainly concentrated on grain refinement [14] or adding rare earth elements to weaken the anisotropy of the alloy [7]. However, few literatures systematically describe the combined effect of Y addition, accumulated strain and rolling temperature on microstructure, mechanical properties and texture of the LA51 alloy.…”

Refinement effect of RE in light weight Mg–Li–Al alloys

“…Ali et al [4] estimated that restriction of grains growth of separated RE elements in front of growing liquid/solid interface is the principal purpose of the grain refinement. That hypothesis was based on the research of RE-containing intermetallic phases on the grain boundaries of the cast alloy [11][12][13][14][15][16][17][18].…”