|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Phase Transformations and Microstructural Evolution
||The Effects of Alloying Element Additions and Heat Treatment Procedures on the Microstructural and Mechanical Development of Nickel-based Superalloys
||Rasim Eris, M. Vedat Akdeniz, Amdulla O. Mekhrabov
|On-Site Speaker (Planned)
Nickel-based superalloys are exceptional materials due to their novel two phase (γ-γ’) microstructures. In this study, therefore, the effects of tertiary alloying X element additions and heat treatment procedures (involving different homogenization and solution heat treatment temperatures and aging times) on the solidification structures, microstructural evolution of γ’-Ni<SUB>3</SUB>Al precipitates (volume fraction, size & size distribution, orientation and shape) and mechanical properties of the Ni<SUB>0.80</SUB>Al<SUB>0.15</SUB>X<SUB>0.05</SUB> (where X = Al, Cr, Co, Nb and Ti) alloy systems will be presented. Furthermore, the results of the experimental studies will be supported by modelling and theoretical first-principles calculations via charge density differences (CDD), electron localization functions (ELF) and density of states (DOS) simulations which demonstrates bonding characteristics of alloying X element atoms with their next neighbours (Ni and Al) and consequently distribution tendencies of constituent atoms in submicro volumes of the Ni<SUB>0.80</SUB>Al<SUB>0.15</SUB>X<SUB>0.05</SUB> alloys in atomic level.
||Planned: Supplemental Proceedings volume