| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Nano and Micro Additive Manufacturing
|
| Presentation Title |
Size-Effects on Microstructure and Mechanical Properties in LPBF-Fabricated, Thin-walled Hastelloy X and SS316L Components |
| Author(s) |
Christian Leinenbach, Rafal Wrobel |
| On-Site Speaker (Planned) |
Christian Leinenbach |
| Abstract Scope |
Laser powder bed fusion (LPBF) is a promising additive manufacturing technology for fabricating complex geometries, enhancing functionality for various applications. This study explores the influence of wall thickness on microstructure formation in LPBF-fabricated Hastelloy X and SS316L components. In-situ temperature measurements and thermal simulations reveal distinct thermal history differences, with local heat accumulation affecting melt pool morphologies in multi-track samples. Significant variations in melt pool size and geometry are observed between different wall thicknesses due to powder denudation and local preheating. Thinner samples exhibit solidification cells oriented parallel to the building direction, while thicker walls show side branching and slender columnar grains. Mechanical tests demonstrate higher strength in thicker samples due to finer solidification cells. Moreover, thicker samples exhibit twice the ductility of thinner ones, offering valuable insights for optimizing LPBF fabrication of thin-walled structures in Hastelloy X and 316L stainless steel, advancing material performance in demanding applications. |
| Proceedings Inclusion? |
Planned: |