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      A critical review of high entropy alloys and related concepts

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      Acta Materialia
      Elsevier BV

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          Microstructures and properties of high-entropy alloys

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            A fracture-resistant high-entropy alloy for cryogenic applications.

            High-entropy alloys are equiatomic, multi-element systems that can crystallize as a single phase, despite containing multiple elements with different crystal structures. A rationale for this is that the configurational entropy contribution to the total free energy in alloys with five or more major elements may stabilize the solid-solution state relative to multiphase microstructures. We examined a five-element high-entropy alloy, CrMnFeCoNi, which forms a single-phase face-centered cubic solid solution, and found it to have exceptional damage tolerance with tensile strengths above 1 GPa and fracture toughness values exceeding 200 MPa·m(1/2). Furthermore, its mechanical properties actually improve at cryogenic temperatures; we attribute this to a transition from planar-slip dislocation activity at room temperature to deformation by mechanical nanotwinning with decreasing temperature, which results in continuous steady strain hardening. Copyright © 2014, American Association for the Advancement of Science.
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              Stabilization of metallic supercooled liquid and bulk amorphous alloys

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                Author and article information

                Journal
                Acta Materialia
                Acta Materialia
                Elsevier BV
                13596454
                January 2017
                January 2017
                : 122
                :
                : 448-511
                Article
                10.1016/j.actamat.2016.08.081
                c0c479b6-6ff8-4d14-b231-5e632b0a0b08
                © 2017
                History

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