About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing: Design, Materials, Manufacturing, Challenges and Applications
|
| Presentation Title |
The Effect of Geometry on the Microstructure and Crystallographic Texture of Haynes 282 Superalloy Produced via Electron Beam Powder Bed Fusion |
| Author(s) |
Amamchukwu Bernard Ilogebe, Maria Quintana, Peter C Collins |
| On-Site Speaker (Planned) |
Amamchukwu Bernard Ilogebe |
| Abstract Scope |
Electron Beam Powder Bed Fusion (PBF-EB) additive manufacturing (AM) allows the creation of highly complex geometries. However, there is a need to account for site-specific process-microstructure-property relationships in these AM-designed complex geometries. This work reveals the effect of geometrical complexities, i.e., engineered internal pores and thin walls, on PBF-EB Haynes 282 parts' microstructure and mechanical properties. The H282 samples used in this work have inbuilt 3mm cubic pores, a 3mm diameter spiral pore, and three thin-walled struts with varying thickness at the top of the part. The microstructure and texture are analyzed using different microscopy techniques. As expected from AM parts, the bulk has elongated textured grains oriented along [001] crystallographic direction, but the inbuilt pores lead to the formation of equiaxed grains, due to nucleation and grain growth competition. Twins were present within the equiaxed grain, suspected to have formed due to grain morphology, local temperature, and strain conditions. |