About this Abstract |
| Meeting |
2025 AWS Professional Program
|
| Symposium
|
2025 AWS Professional Program
|
| Presentation Title |
Influence of Interlayer Temperature on the Microstructure of Modified PH 13-8 Mo Powder Manufactured Using Directed Energy Deposition With a Laser Beam |
| Author(s) |
Gokce Aydin, Fabian Hanning, Joel Andersson, Maria Asuncion Valiente Bermejo |
| On-Site Speaker (Planned) |
Gokce Aydin |
| Abstract Scope |
Additive manufacturing of the PH 13-8 Mo family (martensitic precipitation hardening stainless steel (MPHSS)) has been increasingly studied in recent years. However, investigations on PH 13-8 Mo manufactured using directed energy deposition with a laser beam and powder (DED-LB/p) are still very limited. It is known from the literature that the microstructure, especially the austenite phase fraction of additively manufactured martensitic stainless steels (MSS) depends on the interlayer temperatures during processing and the austenite phase fraction of MSS is critical in terms of mechanical properties. Therefore, in this study, three modified PH 13-8 Mo blocks were manufactured with three different interlayer temperatures (30 °C (~ room temperature), 100 °C (below martensitic start temperature) and 180 °C (above martensitic start temperature)) using DED-LB/p. As-deposited samples were subjected to post-processing heat treatments such as solution treatment and solution treatment + aging to homogenize the microstructure and achieve the necessary mechanical properties. The influence of the different interlayer temperatures on the microstructure and the austenite phase fraction of as-deposited and heat-treated modified PH 13-8 Mo was investigated using scanning electron microscope (SEM), electron Backscatter diffraction (EBSD), and microhardness at different locations. |
| Proceedings Inclusion? |
Undecided |