| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Solid-State Phase Transformations and Microstructural Evolution
|
| Presentation Title |
New Superalloy ABD-900AM for Additive Manufacturing: The Role of Heat Treatment on Mechanical Properties |
| Author(s) |
Yuanbo Tony Tang, Joseph Ghoussoub, John Clark, Andre Nemeth, Roger Reed |
| On-Site Speaker (Planned) |
Yuanbo Tony Tang |
| Abstract Scope |
The role of heat treatment on the new superalloy ABD-900AM is studied. The alloy was designed specifically for additive manufacturing, which presents superior processibility. The as-fabricated microstructure is investigated with advanced characterisation techniques, which includes X-ray synchrotron diffractometry and transmission kikuchi diffraction. The extreme cooling rates arising during the process suppress the gamma prime phase formation; thus the details of heat treatment are vital in tailoring the properties. The strength developed are marginally improved by super-solvus rather than sub-solvus heat treatment, but the ductility is then sacrificed. The tensile behaviour is superior to the heritage alloy IN939 which is comparable in gamma prime content; this is due to its finer scale precipitation and higher refractory content. The high dislocation density inherit by AM is sufficient to promote recrystallization during super-solvus heat treatment, which removes the texture and facilitates grain growth; however, this effect is not found for the sub-solvus case. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Temperature Materials, Mechanical Properties |