Incoherent long period stacking ordered phases and age-hardening in Mg-Gd-Ga alloys
Source abstract
Abstract
Abstract The intermetallic phases of as-cast and annealed Mg-5Gd-3.5Ga (at.%) alloys were characterized by means of electron microscopies. Coherent and incoherent 18R long period stacking ordered (LPSO) phases with α-Mg were observed in the alloys and the high diffusion coefficient of Ga was the key factor for the appearance of incoherent LPSO phases. Segregation and β F ’ phases were observed in the peak-aged samples, which contributed to the large improvements of microhardness and compression properties after heat treatment. In addition, the GdMgGa phase with a hexagonal ZrNiAl-type structure was studied by transmission electron microscopy (TEM) and scanning transmission electron microscopy (STEM). The incoherent LPSO phases provided a new way of strengthening the mechanical properties of Mg alloys instead of introducing dispersive LPSO phases only.
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Research context
OpenAlex topics: Magnesium Alloys: Properties and Applications · Hydrogen Storage and Materials · Aluminum Alloys Composites Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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