|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Deformation and Damage Mechanisms in High Temperature Ni, Co and Fe-based Superalloys
||Mechanical Properties of Modified INCONEL® Alloy 718 with γʹ/γʹʹ Compact Morphology
||Martin Detrois, Kyle A Rozman, Paul D Jablonski, Jeffrey A Hawk
|On-Site Speaker (Planned)
INCONEL® alloy 718 has been widely used in aerospace and land-based power industries. Typically, the alloy presents a conventional precipitate-strengthened γ-γ′/γ′′ microstructure when appropriate aging treatments are employed. In a publication from 1973, Cozar and Pineau obtained a compact morphology consisting of γ′′ shells around the γ′ precipitates in modified 718 alloys. This type of microstructure was proved to be stable even after extended aging due to restricted γ′ coarsening which could potentially increase the maximum service temperature of alloy 718. In this investigation, the mechanical performance of the modified INCONEL® 718 alloys were assessed using tensile and creep testing. Thermodynamic and kinetic predictions, were used to help in the design process and were validated experimentally. Various compositions and aging treatments were investigated. The effect of the composition/microstructure on the mechanical performance of the modified INCONEL® 718 will be discussed and compared to INCONEL® alloy 725 variants.
||Planned: Supplemental Proceedings volume