|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Microstructural Templates Consisting of Isostructural Ordered Precipitate / Disordered Matrix Combinations: Microstructural Evolution and Properties
||The Role of Precipitate Size Distribution and Morphology on Ni Superalloy Deformation Micromechanisms
||James Coakley, Muhammad Awais, Jonathan Cormier, Ke An, Neil D'Souza, Howard Stone
|On-Site Speaker (Planned)
The initial microstructures of Ni superalloys differ depending on engine component and service conditions. The microstructures then evolve during engine operation with a concomitant evolution of material properties and deformation micromechanisms. In the current work, single crystal Ni superalloy CMSX-4 has been processed to represent four critical microstructures that arise in superalloys: (i) a unimodal gamma-prime size distribution used in blade applications; (ii) a bimodal gamma-prime size distribution used in disc applications; (iii) a rafted gamma-prime size distribution that arises during blade operating conditions; (iv) a bimodal gamma-prime size distribution with rafted gamma-prime and cooling gamma-prime. In-situ neutron diffractometry is utilized during low temperature tensile deformation in order to compare the strengthening and deformation micromechanisms across these very different microstructures, and will be presented.
||High-Temperature Materials, Characterization, Mechanical Properties