High-entropy alloy strengthened by in situ formation of entropy-stabilized nano-dispersoids

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This article focuses on the effect of introducing Y₂O₃ in the Al₀.₃CoCrFeMnNi high-entropy alloys, fabricated using mechanical alloying and spark plasma sintering.

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9 p.

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Gwalani, B.; Pohan, Rizaldy M.; Lee, Junho; Lee, Bin; Banerjee, Rajarshi; Ryu, Ho Jin et al. September 20, 2018.

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This article is part of the collection entitled: UNT Scholarly Works and was provided by UNT College of Engineering to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 24 times . More information about this article can be viewed below.

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This article focuses on the effect of introducing Y₂O₃ in the Al₀.₃CoCrFeMnNi high-entropy alloys, fabricated using mechanical alloying and spark plasma sintering.

Physical Description

9 p.

Notes

Abstract: A significant increase in compressive yield strength of the Al0.3CoCrFeMnNi high-entropy alloy (HEA) from 979 MPa to 1759 MPa was observed upon the introduction of 3 vol.% Y2O3. The HEAs were processed using spark plasma sintering of mechanically alloyed powders. Transmission electron microscopy and atom probe tomography confirmed the presence of compositionally complex nanodispersoids in the Y2O3-added HEA. The significant increase in strength can be attributed to the nano-dispersoid strengthening coupled with grain refinement. Therefore, the in-situ formation of the compositionally complex nanoscale dispersoids during the alloy processing could be a novel approach to create entropy-stabilized oxide particles in strengthening of HEAs.

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  • Scientific Reports, 2018. London, UK: Nature Publishing Group

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  • Preferred Citation: Scientific Reports
  • Volume: 8
  • Page Start: 1
  • Page End: 9
  • Peer Reviewed: Yes

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UNT Scholarly Works

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  • September 20, 2018

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  • May 1, 2018

Accepted Date

  • September 11, 2018

Added to The UNT Digital Library

  • Oct. 12, 2018, 10:49 a.m.

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Gwalani, B.; Pohan, Rizaldy M.; Lee, Junho; Lee, Bin; Banerjee, Rajarshi; Ryu, Ho Jin et al. High-entropy alloy strengthened by in situ formation of entropy-stabilized nano-dispersoids, article, September 20, 2018; London, United Kingdom. (https://digital.library.unt.edu/ark:/67531/metadc1281803/: accessed May 26, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT College of Engineering.