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 |
Impact of Composition and Solidification Pathway on Additively Manufactured 316L Printed via a Laser-wire Directed Energy Deposition Process |
Author(s) |
Olivia Denonno, Matthew Schreiber, Charles Smith , Kip Findley, John Speer, Anthony Petrella, Craig Brice, Amy Clarke, Joy Gockel, Jonah Klemm-Toole, Zhenzhen Yu |
On-Site Speaker (Planned) |
Olivia Denonno |
Abstract Scope |
Wire-fed laser directed energy deposition is a high deposition rate process ideal for large structures and simple geometries utilizing low-cost feedstock material. Understanding the solidification behavior and microstructure evolution of additively manufactured wire-fed DED austenitic stainless steel is essential for the qualification of the alloy across additive manufacturing platforms. In this study, it was determined that solidification conditions and composition can affect the stability of austenite as the primary solidifying phase relative to delta ferrite. The impacts of solidification pathway, thermal gradients and solidification velocities, and composition on solidification behavior of thin and thick laser-wire DED 316L parts will be discussed and compared. The observed shift in solidification modes among these two builds can be modeled and understood via a comprehensive microstructure map developed using analytical solidification models. This microstructure map can be used to predict microstructure morphology and size as well as solidification mode across additive manufacturing platforms. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |