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Alloying behavior and novel properties of CoCrFeNiMn high-entropy alloy fabricated by mechanical alloying and spark plasma sintering
Affiliation:1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China;2. College of Mechanical and Vehicle Engineering, Hunan University, Changsha 410082, China;3. State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China;1. NETME Centre, Institute of Materials Science and Engineering, Brno University of Technology, Technicka 2896/2 Brno, Czech Republic;2. Department of Materials and Manufacturing Technology, Chalmers University of Technology, Rannavagen 2A, Gothenberg 41296, Sweden;1. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, 066004, PR China;2. Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100039, PR China;3. Department of Materials Science and Engineering, The University of Tennessee, Knoxville, TN, 37996-2200, USA;1. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, PR China;2. University of Chinese Academy of Sciences, Beijing 100049, PR China
Abstract:An equiatomic CoCrFeNiMn high-entropy alloy was synthesized by mechanical alloying (MA) and spark plasma sintering (SPS). During MA, a solid solution with refined microstructure of 10 nm which consists of a FCC phase and a BCC phase was formed. After SPS consolidation, only one FCC phase can be detected in the HEA bulks. The as-sintered bulks exhibit high compressive strength of 1987 MPa. An interesting magnetic transition associated with the structure coarsening and phase transformation was observed during SPS process.
Keywords:A. High-entropy alloys  B. Mechanical properties  B. Magnetic properties  C. Mechanical alloying and milling  D. Microstructure  F. Electron microscopy, transmission
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