Cellular precipitation and precipitate coarsening in a Mg-Al alloy

The morphology and growth kinetics of the cellular precipitate as well as its discontinuous coarsening have been studied in the temperature range 440–580 K. Optical microscopy and X-ray diffraction were used to characterize the cellular transformation. A rapidly solidified metastable Mg-7 at.% Al alloy was observed to decompose completely via a process which has been termed “cellular precipitation” into a lamellar structure consisting of the δ...