Results and discussion
3.1. Experimental cooling curves
Fig. 5 shows the cooling curves at the three austenitizing temperatures:
800 C, 850 C and 900 C. The positions of the six
thermocouples at the specimen were explained at Fig. 1. The evolution
of the thermal profile consistently compares with the results
obtained by Çakir et al. [10], who used thermocouples to obtain the
Jominy test cooling curves. Similar profiles in other specimens
were obtained by Li et al. [13] (In a AA7050 alloy), and Ben
Ammar et al. [14] (In an alloy, Zircaloy4).