About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Materials Design and Processing Optimization for Advanced Manufacturing: From Fundamentals to Application
|
Presentation Title |
A New CALPHAD-based Approach to Develop Chromium and Nickel Equivalencies for Austenitic Stainless Steels |
Author(s) |
Benjamin Sutton, Nathan Daubenmier, Antonio J. Ramirez |
On-Site Speaker (Planned) |
Benjamin Sutton |
Abstract Scope |
The solidification cracking susceptibility of stainless steels is intimately related to whether austenite or ferrite form as the primary phase during solidification. Since the primary solidification mode of austenitic stainless steels is highly dependent on chemical composition, concerted efforts have been made to relate empirically-derived chemical equivalency relationships to primary phase selection. In this work, high-throughput computational thermodynamic simulations have been used to generate the requisite data to develop chemical equivalency relationships. Composition-dependent metrics related to solidification behavior were defined and served as the response variables to construct statistical models for two simulation types. The CALPHAD-based results were compared with legacy solidification mode data for austenitic stainless steel weld metals. Results indicate that stable/metastable liquidus temperature simulations provide a promising avenue to create chemical equivalency relationships. This approach can be tailored to scenarios where existing relationships do not adequately describe the composition space and/or dendrite growth velocities of interest. |
Proceedings Inclusion? |
Planned: |
Keywords |
Computational Materials Science & Engineering, Solidification, Iron and Steel |