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Table 4 presents the quantified data for the hardness and time for the significant points A, B, C, D and E shown in Figure 6 and described in Figure 4. Figure 7 presents the


graphical representation of the data shown in Table 4.Table 3 presents the salient observations and discussions from the results shown in Figure 6, Table 4 and Figure 7.


Table 4. Quantified Data for Hardness and Time of Points A, B, C and D of Figure 9


(a)


(b)


Figure 7. Graphical representation of the hardness and time values for the points A, B, C, D and E shown in Figure 4.(a) Micro-hardness data and (b) Time duration. Point E was considered at a constant time of 12 h for all the three rates of quenching.


26 International Journal of Metalcasting/Fall 2011


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