About this Abstract |
Meeting |
2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
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Symposium
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2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
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Presentation Title |
Cellular Subgrain Features in Directed Energy Deposited Stainless Steel 316L: The Influence of Morphology on Mechanical Properties |
Author(s) |
Janith Wanni, Ajit Achuthan |
On-Site Speaker (Planned) |
Janith Wanni |
Abstract Scope |
While the influence of cellular subgrain feature in directed energy deposited stainless steel 316L (DED 316L) has been established as the dominant factor in the observed exceptional combination of strength and ductility of AM 316L, the specific role of morphologies is not well understood. The present study on the mechanism of formation, microstructural characteristics, and the influence on mechanical properties of cellular subgrain features reveal many new insights. Microstructural analysis of the DED 316L specimens containing cellular subgrain features of tubular and vermicular morphologies show very different element segregation and secondary phase distribution. The mechanism responsible for the formation of the two different morphologies is the differences in the solidification modes due to different solidification conditions. Irrespective of the widely different morphologies the two builds exhibited similar mechanical behavior indicating that it is the overall barrier that determines their influence on the mechanical properties, not the differences in their morphologies. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |