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      Effect of Binding and Dispersion Behavior of High-Entropy Alloy (HEA) Powders on the Microstructure and Mechanical Properties in a Novel HEA/Diamond Composite

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          Abstract

          This study reports the results of the addition of diamonds in the sintering process of a FCC-structured CoCrFeNiMo high-entropy alloy. The effect of raw powder states such as elemental mixed (EM) powder, gas atomization (GA) powder and mechanical alloying (MA) powder on the uniformity of constituent phase was also investigated. Examination of microstructure and evaluation of mechanical properties of the composites depending on the mixing processes were performed. As a result, GA+MA powder composite showed the highest mechanical properties. The experimental results indicated that the powder manufacturing method was an essential parameter to determine the quality of HEA/diamond composites such as the uniformity of phase and binding behavior.

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          Microstructures and properties of high-entropy alloys

          Yong Zhang, Ting Ting Zuo, Zhi Qun Tang … (2014)
          Article 0 comments Cited 788 times – based on 0 reviews     Review now
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            A fracture-resistant high-entropy alloy for cryogenic applications.

            Bernd Gludovatz, Anton Hohenwarter, Dhiraj Catoor … (2014)
            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.
            Article 0 comments Cited 740 times – based on 0 reviews     Review now
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              Mechanical alloying and milling

              C. Suryanarayana (2001)
              Article 0 comments Cited 608 times – based on 0 reviews     Review now
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                Author and article information

                Journal
                Journal ID (nlm-ta): Entropy (Basel)
                Journal ID (iso-abbrev): Entropy (Basel)
                Journal ID (publisher-id): entropy
                Title: Entropy
                Publisher: MDPI
                ISSN (Electronic): 1099-4300
                Publication date (Electronic): 04 December 2018
                Publication date Collection: December 2018
                Volume: 20
                Issue: 12
                Electronic Location Identifier: 924
                Affiliations
                [1 ]Powder Metallurgy Research Institute, Central South University, Changsha 410083, China
                [2 ]College of Engineering, Nanjing Agricultural University, Nanjing 210031, China
                [3 ]Henan Huanghe Whirlwind Co., Ltd., Xuchang 461500, China
                Author notes
                [* ]Correspondence: waycsu@ 123456csu.edu.cn ; Tel.: +86-731-8887-7669
                Article
                Publisher ID: entropy-20-00924
                DOI: 10.3390/e20120924
                PMC ID: 7512511
                SO-VID: 8179e1bd-6f46-4e54-bb44-876bb348ec58
                Copyright © © 2018 by the authors.
                License:

                Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ( http://creativecommons.org/licenses/by/4.0/).

                History
                Date received : 29 October 2018
                Date accepted : 30 November 2018
                Categories
                Subject: Article

                Keywords: high-entropy alloy,diamond,composite,powder metallurgy,spark plasma sintering
                Data availability:
                Keywords: high-entropy alloy, diamond, composite, powder metallurgy, spark plasma sintering

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