|About this Abstract
|2023 TMS Annual Meeting & Exhibition
|Advanced Characterization of High-temperature Alloys: Phase Evolution during Manufacturing and Service-induced Deformation
|Variations in γ′ Formers and Refractory Elements for Enhanced Creep Resistance and Phase Stability of Alloy 282
|Martin Detrois, Stoichko Antonov, Chantal K Sudbrack, Jonathan D Poplawsky, Paul D Jablonski
|On-Site Speaker (Planned)
Modifications to the chemistry of alloy 282 were performed to improve the alloy’s resistance to long term creep deformation as well as phase stability. Alloys were prepared using vacuum induction melting, computationally optimized homogenization heat treatment and hot working. Phase stability studies were carried out for up to 5,000 hours at 800°C and 900°C while creep testing was performed at conditions leading to lives past 7,000 hours for temperatures ranging from 740°C to 900°C. The formation of σ and μ phases were reduced in the modified alloy. Atom probe tomography (APT) was performed on the specimens from the phase stability study to investigate changes in the elemental partitioning to the γ and γ′ phases. Post deformation microstructures were analyzed using EBSD and TEM to study the influence of the detrimental phases on damage accumulation during creep.
|High-Temperature Materials, Mechanical Properties, Phase Transformations