Thixoforming : Semi-solid Metal Processing

Figure 6.47 Variation of (a) temperature and solid fraction and
(b) grain density at a middle point and outlet point over the
channel versus flow time.
6.3 Simulation of Cooling Channelj213
Validation experiments were conducted under the same conditions as simulation.
Figure 6.49 shows the resulting microstructure after holding for 120 s in the
container. The average measured temperature inside the container after 120 s was
863.60 K while the computed value in Figure 6.48a lies between 864.88 and 867.27 K,
which is an indicator of the good agreement of heat flow models and boundary
condition application. On the other hand, the experimental grain density
(1.731 10 12 m 3 ) and the average grain size (0.0558 mm) deviated from the