International Journal of Extreme Manufacturing, Volume. 3, Issue 1, 15201(2021)

Laser metal deposition of refractory high-entropy alloys for high-throughput synthesis and structure-property characterization

Henrik Dobbelstein1,*... Easo P George2,3, Evgeny L Gurevich1, Aleksan-der Kostka4, Andreas Ostendorf1 and Guillaume Laplanche5 |Show fewer author(s)
Author Affiliations
  • 1Applied Laser Technologies, Ruhr-University Bochum, Universittsstr. 150, 44801 Bochum, Germany
  • 2Material Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6115, United States of America
  • 3Materials Science and Engineering Department, University of Tennessee, Knoxville, TN 37996-2100, United States of America
  • 4Center for Interface-Dominated High Performance Materials, Ruhr-University Bochum, Universittsstr. 150, 44801 Bochum, Germany
  • 5Institute for Materials, Ruhr-University Bochum, Universittsstr. 150, 44801 Bochum, Germany
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    Progress in materials development is often paced by the time required to produce and evaluate a large number of alloys with different chemical compositions. This applies especially to refractory high-entropy alloys (RHEAs), which are difficult to synthesize and process by conventional methods. To evaluate a possible way to accelerate the process, high-throughput laser metal deposition was used in this work to prepare a quinary RHEA, TiZrNbHfTa, as well as its quaternary and ternary subsystems by in-situ alloying of elemental powders. Compositionally graded variants of the quinary RHEA were also analyzed. Our results show that the influence of various parameters such as powder shape and purity, alloy composition, and especially the solidification range, on the processability, microstructure, porosity, and mechanical properties can be investigated rapidly. The strength of these alloys was mainly affected by the oxygen and nitrogen contents of the starting powders, while substitutional solid solution strengthening played a minor role.

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    Henrik Dobbelstein, Easo P George, Evgeny L Gurevich, Aleksan-der Kostka, Andreas Ostendorf, Guillaume Laplanche. Laser metal deposition of refractory high-entropy alloys for high-throughput synthesis and structure-property characterization[J]. International Journal of Extreme Manufacturing, 2021, 3(1): 15201

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    Paper Information

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    Received: Jun. 18, 2020

    Accepted: --

    Published Online: Sep. 3, 2021

    The Author Email: Dobbelstein Henrik (dobbelstein@lat.rub.de)

    DOI:10.1088/2631-7990/abcca8

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