Abstract
Fe-Co alloys are an important class of soft magnetic materials that often pose challenges in their fabrication because of the brittle B2-ordered phase. We show that laser beam powder bed fusion (PBF-LB), owing to its rapid cooling rates, offers an avenue for the fabrication of these alloys by suppressing the disorder →order phase transformation at room temperature. We use neutron diffraction to understand the phase transformations in a Fe-50 %Co alloy fabricated via PBF-LB. We report that the disorder→order phase transformation in this alloy occurs concurrently via homogeneous ordering and classical nucleation and growth.
| Original language | English |
|---|---|
| Article number | 100174 |
| Journal | Additive Manufacturing Letters |
| Volume | 7 |
| DOIs | |
| State | Published - Dec 2023 |
Funding
Notice: This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05–00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan ( https://www.energy.gov/downloads/doe-public-access-plan ). PN would like to acknowledge Wendy Hames, ORNL for her help as a technical editor. A portion of this research was performed at the U.S. Department of Energy's (DOE's) Manufacturing Demonstration Facility. This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05–00OR22725 with DOE. Research was co-sponsored by the DOE Office of Energy Efficiency and Renewable Energy, Advanced Manufacturing Office. A portion of this research was funded through the Laboratory Directed Research & Development (LDRD) program at Sandia National Laboratories. Sandia National Laboratories is a multi-mission laboratory managed and operated by National Technology and Engineering Solutions of Sandia LLC, a wholly owned subsidiary of Honeywell International Inc. for DOE's National Nuclear Security Administration under contract DE-NA0003525 . This paper describes objective technical results and analysis. Any subjective views or opinions that might be expressed in the paper do not necessarily represent the views of DOE or the United States Government. A portion of this research used resources at the Spallation Neutron Source, a DOE Office of Science User Facility operated by Oak Ridge National Laboratory. PN would like to acknowledge Wendy Hames, ORNL for her help as a technical editor. A portion of this research was performed at the U.S. Department of Energy's (DOE's) Manufacturing Demonstration Facility. This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05–00OR22725 with DOE. Research was co-sponsored by the DOE Office of Energy Efficiency and Renewable Energy, Advanced Manufacturing Office. A portion of this research was funded through the Laboratory Directed Research & Development (LDRD) program at Sandia National Laboratories. Sandia National Laboratories is a multi-mission laboratory managed and operated by National Technology and Engineering Solutions of Sandia LLC, a wholly owned subsidiary of Honeywell International Inc. for DOE's National Nuclear Security Administration under contract DE-NA0003525. This paper describes objective technical results and analysis. Any subjective views or opinions that might be expressed in the paper do not necessarily represent the views of DOE or the United States Government. A portion of this research used resources at the Spallation Neutron Source, a DOE Office of Science User Facility operated by Oak Ridge National Laboratory.
Keywords
- Additive manufacturing
- Fe-Co
- Order-disorder
- Phase transformations
