About this Abstract |
Meeting |
TMS Specialty Congress 2025
|
Symposium
|
8th World Congress on Integrated Computational Materials Engineering (ICME 2025)
|
Presentation Title |
Design and Optimization of a Heat Treatment for Additively Manufactured Alloy 718 in Oil and Gas Applications |
Author(s) |
Mark R. Stoudt, James S Zuback, Carelyn E Campbell, Andrew D Iams |
On-Site Speaker (Planned) |
Mark R. Stoudt |
Abstract Scope |
Alloy 718 is attractive for additive manufacturing (AM), because it exhibits good strength, corrosion resistance, and weldability. However, the AM build process generates residual stresses, and microstructural heterogeneities that promote variability in the properties and performance. The current heat treatment, designed for wrought material, is not appropriate for the solidification microstructures in AM-processed material. Thus, they often fail to meet the performance specifications for oil and gas applications. An integrated computational materials engineering (ICME) framework combining CALPHAD-based modeling tools and experimental validation was adopted to develop a heat treatment designed specifically for AM-processed Alloy 718. The microstructures and mechanical properties produced by the new protocol were virtually identical to those of wrought material in the same 825 MPa strength condition. The question is whether AM processing affected the susceptibility to environmentally assisted cracking. The rationale behind the heat treatment design, validation, and cracking susceptibility measurements will be presented and discussed. |
Proceedings Inclusion? |
Undecided |