Ni Alloys: Composition and Fabrication

This lecture covers the composition of selected Ni alloys, including single crystal and directionally solidified alloys, discussing the role of elements like Cr, Co, Mo, W, Ta, Nb, Al, Ti, Re, UZ, B, Zr, and Hf. It also delves into the fabrication of single crystal parts, the casting defects that can occur, and the microsegregation phenomena in single crystal alloys. Furthermore, it explores the heat treatment processes for y'-strengthened Ni alloys, the mechanical properties of Ni alloys at different temperatures, and the microstructural changes that occur under various conditions.