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Meeting MS&T22: Materials Science & Technology
Symposium Alloy Phase Transformations at Elevated Temperatures
Presentation Title Single-step Aging Treatment on Cast Haynes 282 Ni-based Alloy – Microstructure and Mechanical Behavior
Author(s) Timothy G. Lach, Xiang Chen
On-Site Speaker (Planned) Timothy G. Lach
Abstract Scope Haynes® 282® alloy is a Ni-based superalloy designed for excellent high-temperature strength and creep resistance. This improved performance is attributed to its chemical composition and microstructural features (e.g., γ' precipitates, soluble species, and metal carbides). To maximize high-temperature strength, Haynes-282 is typically subjected to a solution-annealing heat treatment followed by a two-step age-hardening treatment. However, this is a time-intensive and expensive process. A simplified single-step aging treatment was successfully completed for the wrought version of Haynes-282 and yielded microstructural features that produced strengthening behavior normally associated with more complex thermal processing. For cast Haynes-282, the behavior is made complicated by casting heterogeneities and defects. In this work, high-resolution analytical electron microscopy and high temperature mechanical behavior testing were used to evaluate the microstructural evolution of the single-step aging treatment on cast Haynes-282 alloy. Detailed comparisons will be made with the standard aging treatment and with aging of the wrought alloy.

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Additive Manufacturing Design of Metal Matrix Composites of Stainless Steel 316 and Inconel 718
Alternate Phase Transformation Paths in a Nb-50Ti Alloy in the Presence of Oxygen Interstitials
Develop Precipitation-Strengthened Refractory High Entropy Alloys for Turbine Blades Applications above 1300 Degree Celsius
E-1: Multiscale Modeling of Solidification Processes for Metal & Alloys
Effect of Grain Boundary Phases on Creep Properties of a Novel Ni-Co Based Superalloy
Examining the Influence of Nitride Precipitation on the Performance of Additively Manufactured Nickel Superalloys
Hyper Duplex Stainless Steel: A Study on the Sigma Phase Formation
Impact of Manufacturing Processes on Phase Transformations in High-temperature Alloys: Some Thoughts Based on Representative Case Studies
In-situ Neutron Characterization of Thermomagnetic Processes Utilizing Direct Induction Heating
Metallic Alloy Microstructure Prediction and Control with Processing
Microstructure and Mechanical Properties of W-free γ + γ' Co-based Superalloys with Ni, Cr, and Fe Additions
Microstructure Evolution and Mechanical Properties of α′/α″-Strengthened Ferritic Superalloys
On the Shapes of Time-Temperature-Transformation Curves across Alloys and Reactions
Phase Stability in Cast and Additively Manufactured Al-9 wt%Cu-6 wt%Ce Alloy
Precipitation Strengthening in BCC Al2.7CrMnTiV High-Entropy Alloys
Precursor Metastable Phases and Their Influence on α Precipitation in the Metastable β-titanium Alloy, Ti-5Al-5Mo-5V-3Cr
Single-step Aging Treatment on Cast Haynes 282 Ni-based Alloy – Microstructure and Mechanical Behavior
Solidification Modelling With CALPHAD: Process Applications of Equilibrium and Non-equilibrium Models and When to Use Them
Study of Thermal Decomposition of γ’-Fe4N Using Molecular Dynamics Simulation
The Optimization of Local Phase Transformation Strengthening in Next Generation Superalloys
Thermal Stability and Time-temperature-transformation Diagrams of Co-rich Nanocomposite Ribbons
Tracking Changes in Microstructure and Mechanical Properties of Electron Powder Bed Fusion Produced Inconel-738

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