Effects of 0.5 wt.% Nd Addition on the Microstructure and Mechanical Properties of As-Extruded and Aged Mg-6Al-3Sn-2Zn Alloys

Twinning–Detwinning-Dominated Cyclic Deformation Behavior of a High-Strength Mg-Al-Sn-Zn Alloy during Loading Reversals: Experiment and Modeling

“…The nominal chemical compositions of the studied Mg-Al-Sn-Zn alloy are given in Table 1. To fabricate the alloy, pure Mg (99.8 wt.%), Al (99.9 wt.%), Sn (99.97 wt.%), Zn (99.97 wt.%), Mg-Ce (20 wt.%) and Mg-Nd (20 wt.%) were added into a stainless steel crucible, which was preheated to 750 • C under a mixed CO 2 (99 vol.%) and SF 6 (1 vol.%) atmosphere [28]. An ingot with a diameter of 95 mm and a height of 400 mm was cast by a semi-continuous casting process.…”

“…It was then subjected to a homogenization treatment at 400 • C for 24 h in a furnace followed by water quenching. The ingot was then extruded at 300 • C with an extrusion ratio of 26 at a speed of 5 mm/s and then cooled to room temperature [28]. The average diameter of the extruded bar was 18.6 mm.…”

“…The average diameter of the extruded bar was 18.6 mm. After that, aging treatments of the extruded alloy were performed at 150 • C [28]. An energy-dispersive X-ray spectrometry (EDS) measurement was performed to determine the chemical compositions of the alloy on the cross-sectional plane of the extruded bar, and the obtained results are presented in Table 1 and Figure 1a-h.…”

“…For both undeformed and deformed samples, the EBSD samples were extracted from the center of them along the longitudinal direction. The samples were polished using SiC papers and then electrolytically polished in an ACII polishing solution with a voltage of 25 V and a current of 0.11 A, respectively [28]. The sample scanning was performed on the plane perpendicular to the ED of the alloy with a step size of 0.8 µm in an EBSD system inside a field emission scanning electron microscope (FE-SEM, Hitachi SU-3800, Tokyo, Japan).…”