Deformation twinning in a Mg–Al–Gd ternary alloy containing precipitates with a long-period stacking-ordered (LPSO) structure

 A magnesium alloy containing the Mg–Al–Gd long-period stacking-ordered (LPSO) platelet precipitates parallel to the basal plane was found to deform by c  -axis tension twinning on {112¯1}, whose passage causes the bending of the LPSO platelets, when Mg grains are oriented favorably for extension along the c  -axis during plane-strain compression at room temperature. The bending of the LPSO platelets was found to be caused by the deformation twinning equivalent to {112¯1} twinning in the Mg matrix.