Segregation and microstructure heterogenity of single crystal nickel based superalloy ŽS 26

Microstructural heterogenity was examined in the as-cast microstructure of directionally solidified ZS 26 nickel based superalloy. The distribution of elements in primary and secondary dendrite growth direction was determined by quantitative EDX analysis. Measurements of elemental partitioning show apparent segregation behaviour of Al, Ti, W, and Ni during solidification. The series of one stage solution were used to homogenize samples microstructure of samples and simultaneously to study the solutes redistribution