Microstructural Evolution of γ'-Ni3Al Precipitates Affecting Mechanical Properties of Nickel- based Superalloys

Eriş R., Akdeniz M. V., Mekhrabov A.

TMS 2020 Annual Meeting & Exhibition, California, United States Of America, 23 - 27 February 2020, pp.324

  • Publication Type: Conference Paper / Summary Text
  • City: California
  • Country: United States Of America
  • Page Numbers: pp.324
  • Middle East Technical University Affiliated: Yes


Nickel-based superalloys are exceptional materials due to their novel two phase (γ-γ') microstructures. In this study, the effects of ternary alloying X element additions and heat treatment procedures on the microstructural evolution of γ'-Ni3Al precipitates and mechanical properties of Ni80Al15X5 alloy systems (i.e. X = Cr, Co, Nb or Ti) will be presented. Furthermore, the results of the experimental studies will be supported by modelling and theoretical first-principles calculations via charge density difference (CDD), electron localization function (ELF) and density of states (DOS) simulations which demonstrate site preferences and bonding characteristics of alloying X element atoms with their next neighbour atoms.