As
reported by Chadwick and Yue [18] and Franklin et al.
[29], grain refinement is quite noticeable in squeeze cast
parts. However, their interpretation of such refinement is
sharply different. Chadwick and Yue [18] have claimed that
pressure has no effect on grain refinement, the observed fine grained structure of squeeze castings being principally due
to the increase in heat-transfer coefficients, i.e.