Extremely high strength and work hardening ability in a metastable high entropy alloy

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This article studies the design of a transformation induced plasticity (TRIP) assisted high entropy alloy (HEA) with enhanced strength using two strands of motiviation.

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8 p.

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Nene, Saurabh S.; Frank, Michael; Liu, Kaimiao; Mishra, Rajiv; McWilliams, B. A. & Cho, K. C. July 2, 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 16 times , with 4 in the last month . More information about this article can be viewed below.

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This article studies the design of a transformation induced plasticity (TRIP) assisted high entropy alloy (HEA) with enhanced strength using two strands of motiviation.

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8 p.

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Abstract: Design of multi-phase high entropy alloys uses metastability of phases to tune the strain accommodation by favoring transformation and/or twinning during deformation. Inspired by this, here we present Si containing dual phase Fe42Mn28Co10Cr15Si5 high entropy alloy (DP-5Si-HEA) exhibiting very high strength (1.15 GPa) and work hardening (WH) ability. The addition of Si in DP-5Si-HEA decreased the stability of f.c.c. (γ) matrix thereby promoting pronounced transformation induced plastic deformation in both as-cast and grain refined DP-5Si-HEAs. Higher yet sustained WH ability in fine grained DP-5Si-HEA is associated with the uniform strain partitioning among the metastable γ phase and resultant h.c.p. (ε) phase thereby resulting in total elongation of 12%. Hence, design of dual phase HEAs for improved strength and work hardenability can be attained by tuning the metastability of γ matrix through proper choice of alloy chemistry from the abundant compositional space of HEAs.

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

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  • Publication Title: Scientific Reports
  • Volume: 8
  • Pages: 1-8
  • Peer Reviewed: Yes

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UNT Scholarly Works

Materials from the UNT community's research, creative, and scholarly activities and UNT's Open Access Repository. Access to some items in this collection may be restricted.

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  • July 2, 2018

Submitted Date

  • June 11, 2018

Accepted Date

  • April 10, 2018

Added to The UNT Digital Library

  • July 30, 2018, 12:01 p.m.

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Nene, Saurabh S.; Frank, Michael; Liu, Kaimiao; Mishra, Rajiv; McWilliams, B. A. & Cho, K. C. Extremely high strength and work hardening ability in a metastable high entropy alloy, article, July 2, 2018; London, United Kingdom. (digital.library.unt.edu/ark:/67531/metadc1213684/: accessed November 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT College of Engineering.