In situ synchrotron X-ray imaging and mechanical properties characterization of additively manufactured high-entropy alloy composites
Abstract
Laser beam directed energy deposition has become an increasingly popular advanced manufacturing technique for materials discovery as a result of the in situ alloying capability. In this study, we leverage an additive manufacturing enabled high throughput materials discovery approach to explore the composition space of a graded Wx(CoCrFeMnNi)100–x sample spanning 0 ≤ x ≤ 21 at%. In addition to microstructural and mechanical characterization, synchrotron high speed x-ray computer aided tomography was conducted on a W20(CoCrFeMnNi)80 composition to visualize melting dynamics, powder-laser interactions, and remelting effects of previously consolidated material. Results reveal the formation of the Fe7W6 intermetallic phase at W concentrations> 6 at%, despite the high configurational entropy. Unincorporated W particles also occurred at W concentrations> 10 at% accompanied by a dissolution band of Fe7W6 at the W/matrix interface and hardness values greater than 400 HV. In this work, the primary strengthening mechanism is attributed to the reinforcement of the Fe7W6 and W phases as a metal matrix composite. The in situ high speed x-ray imaging during remelting showed that an additional laser pass did not promote further mixing of the Fe7W6 or W phases suggesting that, despite the dissolution of the W into the Fe7W6 phase being thermodynamically favored,more »
- Authors:
-
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Argonne National Lab. (ANL), Lemont, IL (United States)
- Publication Date:
- Research Org.:
- Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS); Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA); USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC)
- OSTI Identifier:
- 1826067
- Alternate Identifier(s):
- OSTI ID: 1798146; OSTI ID: 1815168
- Report Number(s):
- SAND-2021-7061J
Journal ID: ISSN 0925-8388; 166046
- Grant/Contract Number:
- AC02-06CH11357; AC04-94AL85000; NA0003525
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Alloys and Compounds
- Additional Journal Information:
- Journal Volume: 876; Journal ID: ISSN 0925-8388
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; High-entropy alloys; Additive manufacturing; Refractories; Synchrotron X-ray; Intermetallics; Functional grading
Citation Formats
Pegues, Jonathan Wesley, Melia, Michael Anthony, Rodriguez, Mark A., Babuska, Tomas Farley, Gould, Benjamin, Argibay, Nicolas, Greco, Aaron, and Kustas, Andrew B. In situ synchrotron X-ray imaging and mechanical properties characterization of additively manufactured high-entropy alloy composites. United States: N. p., 2021.
Web. doi:10.1016/j.jallcom.2021.159505.
Pegues, Jonathan Wesley, Melia, Michael Anthony, Rodriguez, Mark A., Babuska, Tomas Farley, Gould, Benjamin, Argibay, Nicolas, Greco, Aaron, & Kustas, Andrew B. In situ synchrotron X-ray imaging and mechanical properties characterization of additively manufactured high-entropy alloy composites. United States. https://doi.org/10.1016/j.jallcom.2021.159505
Pegues, Jonathan Wesley, Melia, Michael Anthony, Rodriguez, Mark A., Babuska, Tomas Farley, Gould, Benjamin, Argibay, Nicolas, Greco, Aaron, and Kustas, Andrew B. Sat .
"In situ synchrotron X-ray imaging and mechanical properties characterization of additively manufactured high-entropy alloy composites". United States. https://doi.org/10.1016/j.jallcom.2021.159505. https://www.osti.gov/servlets/purl/1826067.
@article{osti_1826067,
title = {In situ synchrotron X-ray imaging and mechanical properties characterization of additively manufactured high-entropy alloy composites},
author = {Pegues, Jonathan Wesley and Melia, Michael Anthony and Rodriguez, Mark A. and Babuska, Tomas Farley and Gould, Benjamin and Argibay, Nicolas and Greco, Aaron and Kustas, Andrew B.},
abstractNote = {Laser beam directed energy deposition has become an increasingly popular advanced manufacturing technique for materials discovery as a result of the in situ alloying capability. In this study, we leverage an additive manufacturing enabled high throughput materials discovery approach to explore the composition space of a graded Wx(CoCrFeMnNi)100–x sample spanning 0 ≤ x ≤ 21 at%. In addition to microstructural and mechanical characterization, synchrotron high speed x-ray computer aided tomography was conducted on a W20(CoCrFeMnNi)80 composition to visualize melting dynamics, powder-laser interactions, and remelting effects of previously consolidated material. Results reveal the formation of the Fe7W6 intermetallic phase at W concentrations> 6 at%, despite the high configurational entropy. Unincorporated W particles also occurred at W concentrations> 10 at% accompanied by a dissolution band of Fe7W6 at the W/matrix interface and hardness values greater than 400 HV. In this work, the primary strengthening mechanism is attributed to the reinforcement of the Fe7W6 and W phases as a metal matrix composite. The in situ high speed x-ray imaging during remelting showed that an additional laser pass did not promote further mixing of the Fe7W6 or W phases suggesting that, despite the dissolution of the W into the Fe7W6 phase being thermodynamically favored, it is kinetically limited by the thickness/diffusivity of the intermetallic phase, and the rapid solidification of the laser-based process.},
doi = {10.1016/j.jallcom.2021.159505},
journal = {Journal of Alloys and Compounds},
number = ,
volume = 876,
place = {United States},
year = {Sat Mar 13 00:00:00 EST 2021},
month = {Sat Mar 13 00:00:00 EST 2021}
}
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