New Ni-based superalloys designed for laser additive manufacturing

To balance the relationship between weldability and properties, a series of Ni-based superalloys with varying amount of Cr-like elements were designed using a “cluster-plus-glue-atom” model, and fabricated by laser additive manufacturing (LAM). The microstructure of the as-deposited superalloys consists of few topological close packet (TCP) phases distributed between γ-Ni dendrites with epitaxial growth characteristic. With the increase of...