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Superior elevated-temperature strength-ductility synergy enabled by LPSO structures and β′ precipitates in wire-arc additively manufactured Mg-Gd-Y-Zn-Zr alloys
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DOI：10.1016/j.jma.2026.102207.png)
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Abstract
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• The first attempt to elevated-temperature tensile of WAAM Mg-RE-Zn alloys. • Systematically evaluating the tensile properties and strengthening mechanisms of both as-built and heat-treated specimens. • LPSO structure accommodated plastic strain via kinking deformation, while the β′ precipitates effectively pinned dislocations. • This synergy effectively suppressed grain boundary sliding and the softening induced by dynamic recrystallization at elevated-temperature.
Keywords:
Elevated-temperature mechanical properties
Wire arc additive manufacturing
Mg-Gd-Y-Zn-Zr alloys
LPSO structures
β′ precipitates
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