Laser metal deposition of a refractory TiZrNbHfTa high-entropy alloy

Dobbelstein, Henrik; Gurevich, Evgeny L.; George, Easo P.; Ostendorf, Andreas; Laplanche, Guillaume

doi:10.1016/j.addma.2018.10.008

Laser metal deposition of a refractory TiZrNbHfTa high-entropy alloy

Journal Article · Fri Oct 05 00:00:00 EDT 2018 · Additive Manufacturing

DOI:https://doi.org/10.1016/j.addma.2018.10.008· OSTI ID:1761780

Dobbelstein, Henrik ^[1]; Gurevich, Evgeny L. ^[1]; ^[2]; ^[1]; ^[1]

Ruhr-Univ., Bochum (Germany)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)

Refractory elements have high melting points and are difficult to melt and cast. In this study it is successfully demonstrated for the first time that laser metal deposition can be used to produce TiZrNbHfTa high-entropy alloy from a blend of elemental powders by in-situ alloying. Columnar specimens with a height of 10 mm and a diameter of 3 mm were deposited with a pulsed Nd:YAG laser. The built-up specimen has near-equiatomic composition, nearly uniform grain size, equiaxed grain shape, is bcc single phase and exhibits a high hardness of 509 HV0.2.

View Accepted Manuscript (DOE)

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1761780

Journal Information:: Additive Manufacturing, Journal Name: Additive Manufacturing Journal Issue: 1 Vol. 24; ISSN 2214-8604

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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