| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Materials Design and Alloy Development II
|
| Presentation Title |
A-77 (Digital): Understanding Cellular Structures in Additively Manufactured 316L |
| Author(s) |
Richard W. Fonda, Joseph Aroh, Jerry Feng, David J Rowenhorst |
| On-Site Speaker (Planned) |
Richard W. Fonda |
| Abstract Scope |
It is critical to understand the multiscale microstructural evolution of additively manufactured materials in order to accurately model their responses and behavior. One prominent feature that needs to be better understood is the fine cellular structure that underlies the coarser grain structure in laser powder bed fusion AM 316L builds. These cellular structures have been associated with the observed enhancements in as-built properties, but their origins and characteristics are not well understood. The cellular features have aspect ratios ranging from equiaxed to very elongated and often exhibit multiple cell orientation domains within a single grain. We have systematically characterized these cellular features to reveal their crystallography, orientation, and shape. We will discuss the characteristics of these cellular structures and how they relate to the local crystal growth direction, thermal gradient, and overall build direction. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |