|About this Abstract
|Materials Science & Technology 2020
|Additive Manufacturing of Metals: Complex Microstructures and Architecture Design
|The Structure of Cellular Features in Additively Manufactured 316L
|Richard W. Fonda, Joseph Aroh, Jerry Feng, David Rowenhorst
|On-Site Speaker (Planned)
|Richard W. Fonda
Additive manufacturing of 316L stainless steel by laser powder bed fusion produces a fine cellular structure within the grains. These cellular structures have been associated with enhancements in the as-built properties, but their origins and characteristics are not well understood. The cells exhibit a variety of morphologies and orientations on a polished 2D surface; cells range in aspect ratio 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 three-dimensional crystallography and orientation. We will discuss the characteristics of these cellular structures and how they relate to the local crystallography, local crystal growth direction, thermal gradient, and overall build direction.