Abstract
Heat treatment produces the coherent precipitation of a 14H-type long period ordered (LPO) structure from a supersaturated α′-Mg matrix in Mg–Zn–Gd. Warm-extruded Mg 96.5 Zn 1 Gd 2.5 (at.%) alloys with an LPO structure exhibited high tensile yield strength (345 MPa) and large elongation (6.9%), due to the refinement of α-Mg grains and the high dispersion of a hard LPO structure phase.
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