Microstructure and microhardness of a melt spun Al-Mg alloy with exceptionally high content of Mg

Supersaturated Ribbons of the Al-12Mg alloy are prepared by melt spinning. The objective of this work is to explore the microstructure and microhardness of these ribbons. The results show that each Ribbon is a nearly single-phase solid solution containing a high density of dislocation, and there is few precipitation detected; Grains of the ribbon are equiaxed and the average size of them is 2.51 μm; During crystallization, {111} plane of the alloy grows preferentially parallel to the surface of the ribbon; The ribbons exhibit a relatively high microhardness of 113 HV. The feasibility of using these ribbons to prepare supersaturated Al-12Mg bulk alloy is discussed.