Growth and morphology of β phase in an Mg–Y–Nd alloy

Microstructures and mechanical properties of high performance Mg–4Y–2.4Nd–0.2Zn–0.4Zr alloy

“…The ultimate tensile strength, yield strength and elongation of WE43 alloy were 250 MPa, 165 MPa and 2%, respectively [3]. It has been reported that the high strength of these alloys was attributed to nucleation of a high volume fraction metastable precipitate, and the precipitation process of these alloys had been extensively investigated [4,5]. A four-stage precipitation sequence involving a-Mg (S.S.S.S) ?…”

Effect of Zn on the microstructure and mechanical properties of as-cast Mg–7Gd–3Y–1Nd–0.5Zr alloy

“…According to Refs. [6,18], the β 1 phase has an f.c.c. structure (space group Fm3 m, a ¼0.74 70.01 nm), which renders it isomorphous with a family of intermetallic of the general form Mg 3 RE, and the equilibrium phase β also has a f.c.c.…”

The effect of homogenization on microstructures and mechanical properties of Mg–7Gd–3Y–1Nd–xZn–0.5Zr (x=0.5, 1 and 2wt.%) alloys

“…2a) are shown in Fig 2b and c, the two eutectic phases have been determined to present a face-centered cubic (fcc) Bravais lattice with lattice constant of 0.73 nm and 2.23 nm, respectively. It is well known that the β 1 phase behaves an fcc structure with lattice constant of a = 0.74 ± 0.01 nm, which renders it isomorphous with a family of intermetallic of the general form Mg 3 RE, and the β phase has an fcc structure with lattice constant a = 2.20 ± 0.1 nm, which makes it isomorphous with Mg 5 Gd [13,14]. As mentioned above, it is inferred that the (Mg,Zn) 3 RE and Mg 5 (RE,Zn) phases both have fcc structure and are isomorphous with β 1 and β phases, respectively.…”