| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Deformation and Damage Mechanisms of High Temperature Alloys
|
| Presentation Title |
Improving the Creep Properties of High-strength Superalloys Produced by Laser Powder Bed Fusion |
| Author(s) |
Marcus C. Lam |
| On-Site Speaker (Planned) |
Marcus C. Lam |
| Abstract Scope |
Laser Powder Bed Fusion (LPBF) often produces superalloys with inferior creep properties, limiting the high-temperature load-bearing capability and offsetting some of the benefits of additive manufacturing. One of the critical issues is the inferior microstructure produced after heat treatment. The as-LPBF microstructure often has unique segregation, phase precipitation, defects and grain structures, resulting in undesirable microstructure responses from the conventional heat-treating process. This session presents our studies on modifying the microstructure of a gamma prime bearing superalloy by LPBF to improve its creep resistance. The detailed evolution of grain size, grain texture and gamma prime phases from various heat treatment steps will be revealed and discussed. Creep tests followed by fractography and post-tested microstructure analyses will also demonstrate the creep improvement and the underlying mechanisms. The findings from this research can provide the knowledge in improving the creep property of LFBF-produced superalloys, facilitating their broader applications in high-temperature components. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Temperature Materials, Mechanical Properties |