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Title: High-throughput synthesis of Mo-Nb-Ta-W high-entropy alloys via additive manufacturing

Abstract

High-entropy alloys (HEAs) are a class of alloys that can exhibit promising properties including enhanced irradi-ation resistance, high-temperature strength, and corrosion resistance. However, they exist in a relatively unex-plored region of quasi-limitless composition space. Thus, to enable the development of promisingcompositionally complex alloys, such as HEAs, high-throughput methods are needed. Such high-throughput ca-pabilities are developed and presented in this work. In situ alloying through additive manufacturing wasemployed to produce arrays of different HEA compositions. Sample arrays were then characterized by scanningelectron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and X-ray diffraction (XRD), all whileremaining on the build plate. The top surface of each sample was compositionally homogeneous, as determinedby EDS, and each sample exhibited a single-phase, disordered crystal structure, as determined by XRD. CALcula-tion of PHAse Diagrams (CALPHAD) modeling was used to determine the equilibrium phases of each HEA com-position at lower temperatures, the results of which were compared with XRD results. Implications of high-throughput synthesis techniques and the coupling of high-throughput characterization and modeling techniquesare discussed in the context of alloy development.

Authors:
ORCiD logo; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Univ. of Wisconsin, Madison, WI (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE)
OSTI Identifier:
1574535
Alternate Identifier(s):
OSTI ID: 1801271
Grant/Contract Number:  
NE0008678
Resource Type:
Published Article
Journal Name:
Materials & Design
Additional Journal Information:
Journal Name: Materials & Design Journal Volume: 187 Journal Issue: C; Journal ID: ISSN 0264-1275
Publisher:
Elsevier
Country of Publication:
United Kingdom
Language:
English
Subject:
36 MATERIALS SCIENCE; Materials Science; High-entropy alloy; MoNbTaW; Additive manufacturing; High throughput; In situ alloying

Citation Formats

Moorehead, Michael, Bertsch, Kaila, Niezgoda, Michael, Parkin, Calvin, Elbakhshwan, Mohamed, Sridharan, Kumar, Zhang, Chuan, Thoma, Dan, and Couet, Adrien. High-throughput synthesis of Mo-Nb-Ta-W high-entropy alloys via additive manufacturing. United Kingdom: N. p., 2020. Web. doi:10.1016/j.matdes.2019.108358.
Moorehead, Michael, Bertsch, Kaila, Niezgoda, Michael, Parkin, Calvin, Elbakhshwan, Mohamed, Sridharan, Kumar, Zhang, Chuan, Thoma, Dan, & Couet, Adrien. High-throughput synthesis of Mo-Nb-Ta-W high-entropy alloys via additive manufacturing. United Kingdom. https://doi.org/10.1016/j.matdes.2019.108358
Moorehead, Michael, Bertsch, Kaila, Niezgoda, Michael, Parkin, Calvin, Elbakhshwan, Mohamed, Sridharan, Kumar, Zhang, Chuan, Thoma, Dan, and Couet, Adrien. Sat . "High-throughput synthesis of Mo-Nb-Ta-W high-entropy alloys via additive manufacturing". United Kingdom. https://doi.org/10.1016/j.matdes.2019.108358.
@article{osti_1574535,
title = {High-throughput synthesis of Mo-Nb-Ta-W high-entropy alloys via additive manufacturing},
author = {Moorehead, Michael and Bertsch, Kaila and Niezgoda, Michael and Parkin, Calvin and Elbakhshwan, Mohamed and Sridharan, Kumar and Zhang, Chuan and Thoma, Dan and Couet, Adrien},
abstractNote = {High-entropy alloys (HEAs) are a class of alloys that can exhibit promising properties including enhanced irradi-ation resistance, high-temperature strength, and corrosion resistance. However, they exist in a relatively unex-plored region of quasi-limitless composition space. Thus, to enable the development of promisingcompositionally complex alloys, such as HEAs, high-throughput methods are needed. Such high-throughput ca-pabilities are developed and presented in this work. In situ alloying through additive manufacturing wasemployed to produce arrays of different HEA compositions. Sample arrays were then characterized by scanningelectron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and X-ray diffraction (XRD), all whileremaining on the build plate. The top surface of each sample was compositionally homogeneous, as determinedby EDS, and each sample exhibited a single-phase, disordered crystal structure, as determined by XRD. CALcula-tion of PHAse Diagrams (CALPHAD) modeling was used to determine the equilibrium phases of each HEA com-position at lower temperatures, the results of which were compared with XRD results. Implications of high-throughput synthesis techniques and the coupling of high-throughput characterization and modeling techniquesare discussed in the context of alloy development.},
doi = {10.1016/j.matdes.2019.108358},
journal = {Materials & Design},
number = C,
volume = 187,
place = {United Kingdom},
year = {Sat Feb 01 00:00:00 EST 2020},
month = {Sat Feb 01 00:00:00 EST 2020}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1016/j.matdes.2019.108358

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Cited by: 80 works
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