About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
General Poster Session
|
Presentation Title |
A-161: Microstructure and Mechanical Properties of 410 Stainless Steel via Metal Big Area Additive Manufacturing |
Author(s) |
Sougata Roy, Benjamin Shassere, Jake Yoder, Andrzej Nycz, Mark W. Noakes, Niyanth Sridharan |
On-Site Speaker (Planned) |
Sougata Roy |
Abstract Scope |
Metal Big Area Additive Manufacturing (mBAAM) is a novel wire-arc additive manufacturing method that uses a close loop deposition control approach developed at the Oak Ridge National Laboratory. The mBAAM process was used to fabricate thin walled builds using ER410 welding wire. The uni-axial tensile and CVN tests conducted on the ‘as printed’ samples showed significant scatter among the samples sectioned parallel, perpendicular and at 45° angle to the build direction. Microstructural study confirmed formation of d (delta) ferrite as the driving factor behind such sporadic results. In addition to processing, strategies to improve and homogenize the mechanical properties via post processing heat treatments were also explored. Normalizing at 1050°C for 1 hr. resulted dissolution of delta ferrite into the microstructure which led to significantly uniform tensile and Charpy test results. Increasing tempering temperature above 450°C resulted significant reduction on surface hardness but tempering above 550°C showed compelling increase in toughness. |
Proceedings Inclusion? |
Undecided |