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Synthesis of Al0.5CoCrCuFeNi and Al0.5CoCrFeMnNi High-Entropy Alloys by Laser Melting

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Abstract

High-entropy alloys (HEAs) are a blend of 5+ metallic elements that can form solid solution disordered structures. Two HEAs were synthesized using laser melting in an argon atmosphere. The relatively well-studied Al0.5CoCrCuFeNi alloy was first produced to establish the feasibility of laser melting. Manganese was then substituted for copper to potentially lower both cost and density, producing a novel Al0.5CoCrFeMnNi alloy system. These samples were analyzed with XRD, SEM, EDS, and Vickers microhardness to determine the effects of the manganese substitution, as well as the effects of laser melting in comparison to the more traditional arc melting.

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The authors would like to thank David Brice and Mageshwari Komarasamy for assistance in SEM and EDS data, Benjamin Glass for assistance in sample preparation and hardness, and Jesse Smith for operation of the rolling mill. Additional thanks to Dr. Peter Collins for supplying commercially pure Mn. The authors also acknowledge Center for Advanced Research and Technology (CART) at the University of North Texas for microstructural analysis facility.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, University of North Texas, Denton, TX, 76203-5017, USA

    Travis G. Novak (Undergraduate Student, Graduate Student), Hitesh D. Vora (Postdoctoral Research Associate), Rajiv S. Mishra (Professor), Marcus L. Young (Assistant Professor) & Narendra B. Dahotre (University Distinguished Research Professor)

  2. Korea Advanced Institute of Science and Technology, Daejeon, 305-701, Korea

    Travis G. Novak (Undergraduate Student, Graduate Student)

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  1. Travis G. Novak
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  2. Hitesh D. Vora
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  3. Rajiv S. Mishra
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  5. Narendra B. Dahotre
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Correspondence to Rajiv S. Mishra.

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Manuscript submitted February 5, 2014.

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Novak, T.G., Vora, H.D., Mishra, R.S. et al. Synthesis of Al0.5CoCrCuFeNi and Al0.5CoCrFeMnNi High-Entropy Alloys by Laser Melting. Metall Mater Trans B 45, 1603–1607 (2014). https://doi.org/10.1007/s11663-014-0170-4

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  • DOI: https://doi.org/10.1007/s11663-014-0170-4

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