A Novel γ′-Strengthened Nickel-Based Superalloy for Laser Powder Bed Fusion
Jinghao Xu, Hans Gruber, Ru Lin Peng, Johan Moverare
Abstract
An experimental printable γ'-strengthened nickel-based superalloy, MAD542, is proposed. By process optimization, a crack-free component with less than 0.06% defect was achieved by laser powder bed fusion (LPBF). After post-processing by solution heat treatment, a recrystallized structure was revealed, which was also associated with the formation of annealing twins. After the aging treatment, 60-65% γ' precipitates were obtained with a cuboidal morphology. The success of printing and post-processing the new MAD542 superalloy may give new insights into alloy design approaches for additive manufacturing.
Topics & Concepts
SuperalloyMaterials scienceFusionMetallurgyAnnealing (glass)AlloyNickelNickel alloyMicrostructureLaserOpticsPhysicsLinguisticsPhilosophyAdditive Manufacturing Materials and ProcessesHigh Entropy Alloys StudiesHigh Temperature Alloys and Creep