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Title: Phase Transitions of Cu and Fe at Multiscales in an Additively Manufactured Cu–Fe Alloy under High-Pressure

Abstract

A state of the art, custom-built direct-metal deposition (DMD)-based additive manufacturing (AM) system at the University of Michigan was used to manufacture 50Cu–50Fe alloy with tailored properties for use in high strain/deformation environments. Subsequently, we performed preliminary high-pressure compression experiments to investigate the structural stability and deformation of this material. Our work shows that the alpha (BCC) phase of Fe is stable up to ~16 GPa before reversibly transforming to HCP, which is at least a few GPa higher than pure bulk Fe material. Furthermore, we observed evidence of a transition of Cu nano-precipitates in Fe from the well-known FCC structure to a metastable BCC phase, which has only been predicted via density functional calculations. Finally, the metastable FCC Fe nano-precipitates within the Cu grains show a modulated nano-twinned structure induced by high-pressure deformation. The results from this work demonstrate the opportunity in AM application for tailored functional materials and extreme stress/deformation applications.

Authors:
ORCiD logo; ; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division
OSTI Identifier:
1866013
Alternate Identifier(s):
OSTI ID: 1866259; OSTI ID: 1874874
Report Number(s):
LLNL-JRNL-835497
Journal ID: ISSN 2079-4991; NANOKO; PII: nano12091514
Grant/Contract Number:  
NA0003857; AC02-06CH11357; AC52-07NA27344
Resource Type:
Published Article
Journal Name:
Nanomaterials
Additional Journal Information:
Journal Name: Nanomaterials Journal Volume: 12 Journal Issue: 9; Journal ID: ISSN 2079-4991
Publisher:
MDPI AG
Country of Publication:
Switzerland
Language:
English
Subject:
36 MATERIALS SCIENCE; Additive manufacturing; Cu and Fe precipitates; Cu-Fe alloys; Hierarchical microstructure; Phase transformation

Citation Formats

Chatterjee, Arya, Popov, Dmitry, Velisavljevic, Nenad, and Misra, Amit. Phase Transitions of Cu and Fe at Multiscales in an Additively Manufactured Cu–Fe Alloy under High-Pressure. Switzerland: N. p., 2022. Web. doi:10.3390/nano12091514.
Chatterjee, Arya, Popov, Dmitry, Velisavljevic, Nenad, & Misra, Amit. Phase Transitions of Cu and Fe at Multiscales in an Additively Manufactured Cu–Fe Alloy under High-Pressure. Switzerland. https://doi.org/10.3390/nano12091514
Chatterjee, Arya, Popov, Dmitry, Velisavljevic, Nenad, and Misra, Amit. Fri . "Phase Transitions of Cu and Fe at Multiscales in an Additively Manufactured Cu–Fe Alloy under High-Pressure". Switzerland. https://doi.org/10.3390/nano12091514.
@article{osti_1866013,
title = {Phase Transitions of Cu and Fe at Multiscales in an Additively Manufactured Cu–Fe Alloy under High-Pressure},
author = {Chatterjee, Arya and Popov, Dmitry and Velisavljevic, Nenad and Misra, Amit},
abstractNote = {A state of the art, custom-built direct-metal deposition (DMD)-based additive manufacturing (AM) system at the University of Michigan was used to manufacture 50Cu–50Fe alloy with tailored properties for use in high strain/deformation environments. Subsequently, we performed preliminary high-pressure compression experiments to investigate the structural stability and deformation of this material. Our work shows that the alpha (BCC) phase of Fe is stable up to ~16 GPa before reversibly transforming to HCP, which is at least a few GPa higher than pure bulk Fe material. Furthermore, we observed evidence of a transition of Cu nano-precipitates in Fe from the well-known FCC structure to a metastable BCC phase, which has only been predicted via density functional calculations. Finally, the metastable FCC Fe nano-precipitates within the Cu grains show a modulated nano-twinned structure induced by high-pressure deformation. The results from this work demonstrate the opportunity in AM application for tailored functional materials and extreme stress/deformation applications.},
doi = {10.3390/nano12091514},
journal = {Nanomaterials},
number = 9,
volume = 12,
place = {Switzerland},
year = {Fri Apr 29 00:00:00 EDT 2022},
month = {Fri Apr 29 00:00:00 EDT 2022}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.3390/nano12091514

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