Simulations of Non-Equilibrium and Equilibrium Segregation in Nickel-Based Superalloy Using Modified Scheil-Gulliver and Phase-Field Methods

• Published in: MATERIALS TRANSACTIONS Vol. 61; no. 11; pp. 2072 - 2078
• Main Authors: Okugawa, Masayuki, Izumikawa, Daichi, Koizumi, Yuichiro
• Format: Journal Article
• Language: English
• Published: Sendai The Japan Institute of Metals and Materials 01.11.2020; Japan Science and Technology Agency
• Subjects: Chemical composition; Chromium; Corrosion resistance; Crack sensitivity; Depletion; equilibrium segregation; Face centered cubic lattice; Grain boundaries; Hastelloy (trademark); Hastelloy-X; High temperature; Manganese; Material properties; Molybdenum; multi-component solid solution; Ni-based superalloy; Nickel; Nickel base alloys; non-equilibrium segregation; phase-field method; Scheil-Gulliver model with back diffusion; Segregations; Solidification; Superalloys

Solute segregation significantly affects material properties and is an essential issue in the additive manufacturing (AM) process. In the present study, we have investigated (i) non-equilibrium segregation in solidification, and (ii) equilibrium segregation at grain boundary in Ni-based Hastelloy-X...