《Table 3:Characteristic temperatures, undercooling and dendritic growth velocity in Ni-based single

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《Dendritic branching patterns in platforms of complex Ni-based single crystal castings》

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In the DS process of Ni-based SX superalloys，the castings solidified with the dendrites putting forward at the solid-liquid interface.Due to the different melting points of elements，the dendrite core was formed at first containing more elements with a high melting point，while the elements with a low melting point were expelled to the front of the solid-liquid interface，and finally solidified to form an interdendritic region[20-21]Therefore，the temperature at the solid-liquid interface could be approximately equal to the melting point of the interdendritic composition.Based on the interdendritic composition of the platform as shown in Table 2，the interface temperatures（marked as T*）of the three SXs were calculated by Thermo-Cal software and the results are listed in Table 3.In addition，the liquidus temperatures of the three SXs measured by DSC experiments are shown in Fig.9.It is seen that both the solidus temperatures and the liquidus temperatures increase with the SX generation increasing.