(a) with-CHG


(a) no-CHG


(b) with-CHG


(b) no-CHG


(c) with-CHG


(c) no-CHG


Figure 8. Micrographs of the DTA samples from the with-CHG and no-CHG areas cooled at various scanning rates: (a) 5 K/min, (b) 10 K/min and (c) 15 K/min. Note that the scale is not the same for (b) with-CHG and (b) no-CHG as for the other micrographs.


40 International Journal of Metalcasting/Winter 2012


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