Abstract
TiN particles reinforced IN718C superalloy composite (TiN/IN718C composite) was prepared by investment casting, and the microstructure and mechanical properties of TiN/IN718C composite was investigated. TiN particles were uniformly distributed in the matrix and the harmful δ phase and Laves phase were decreased. The microstructure evolution of the TiN/IN718C composite was caused by the redistribution of the Nb, Ti and C elements in the matrix and TiN particles. The significantly increment of ultimate tensile strength and yield strength of TiN/IN718C composite compared to the matrix IN718C superalloy was attributed to the stress transfer effect of TiN particles and the optimized microstructure.
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