Nano-graining a particle-strengthened high-entropy alloy

Lee, Dong-Hyun; Park, Jeong-Min; Yang, Guanghui; He, Junyang; Lu, Zhaoping; Suh, Jin-Yoo; Kawasaki, Megumi; Ramamurty, Upadrasta; Jang, Jae-il

doi:10.1016/j.scriptamat.2018.12.033

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Nano-graining a particle-strengthened high-entropy alloy

Lee, D.-H., Park, J.-M., Yang, G., He, J., Lu, Z., Suh, J.-Y., et al. (2019). Nano-graining a particle-strengthened high-entropy alloy. Scripta Materialia, 163, 24-28. doi:10.1016/j.scriptamat.2018.12.033.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0008-2AC2-E Version Permalink: http://hdl.handle.net/21.11116/0000-0008-2AC3-D

Genre: Journal Article

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Creators:
Lee, Dong-Hyun¹, Author
Park, Jeong-Min², Author
Yang, Guanghui², Author
He, Junyang³, Author
Lu, Zhaoping⁴, Author
Suh, Jin-Yoo⁵, Author
Kawasaki, Megumi⁶, Author
Ramamurty, Upadrasta⁷, Author
Jang, Jae-il⁸, Author

Affiliations:
1Alloys for Additive Manufacturing, Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_2117289
2Division of Materials Science and Engineering, Hanyang University, Seoul, 04763, South Korea, ou_persistent22
3Atom Probe Tomography, Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863384
4State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China, ou_persistent22
5High Temperature Energy Materials Research Center, Korea Institute of Science and Technology, Seoul, South Korea, ou_persistent22
6School of Mechanical, Industrial & Manufacturing Engineering, Oregon State University, Corvallis, OR 97331-6001, USA, ou_persistent22
7School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore 639798, ou_persistent22
8Division of Materials Science and Engineering, Hanyang University, Seoul 04763, South Korea, ou_persistent22

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Free keywords: Grain boundaries; Grain refinement; Nanocrystals; Nanoindentation; Torsional stress, Grain boundary strengthening; High entropy alloys; High pressure torsions; Nanoindentation experiments; Particle strengthening; Second phase particles; Strengthening mechanisms; Structural transformation, Entropy

Abstract: The possibility of further enhancing the strength of a (CoCrFeNi) 94 Ti 2 Al 4 high-entropy alloy (HEA), which is already strengthened by Ni 3 (Ti,Al) second-phase particles, by grain refinement through high-pressure torsion (HPT) is examined. Concomitant with nanograin formation, HPT was found to induce particle dissolution and structural transformation of the remnant particles. Nanoindentation experiments of nanocrystalline HEA, with and without particles in the pre-HPT microstructure, suggests that grain boundary strengthening is the dominant strengthening mechanism. © 2018 Elsevier Ltd

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Language(s): eng - English

Dates: Published in Print: 2019-04-01

Publication Status: Published in print

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Rev. Type: Peer

Identifiers: DOI: 10.1016/j.scriptamat.2018.12.033

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Title: Scripta Materialia

Abbreviation : Scripta Mater.

Source Genre: Journal

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Publ. Info: Amsterdam : Elsevier B. V.

Pages: - Volume / Issue: 163 Sequence Number: - Start / End Page: 24 - 28 Identifier: ISSN: 1359-6462
CoNE: https://pure.mpg.de/cone/journals/resource/954926243506