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Solute Content and the Grain Microstructure of High Pressure Diecast Magnesium–Aluminium Alloys
Author(s) -
Nagasekhar Anumalasetty V.,
Easton Mark A.,
Cáceres Carlos H.
Publication year - 2009
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.200900175
Subject(s) - materials science , microstructure , aluminium , nucleation , grain size , metallurgy , magnesium , composite material , thermodynamics , physics
The grain microstructure is strongly bimodal due to the mixture of large dendritic grains that solidify in the shot sleeve and are subsequently injected into the die cavity, and the small grains that nucleate inside the cavity and grow to a size dictated by the solute content and the solidification rate. The large grains form only in concentrated alloys; their size is also partially controlled by the growth restriction factor.