Journal
MATERIALS LETTERS
Volume 258, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2019.126772
Keywords
Metals and alloys; High-entropy alloys; Nitrogen; Precipitate; Microstructure; Mechanical properties
Funding
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education [NRF-2018R1A2B6005809]
- National Research Foundation of Korea [22A20130012792] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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A design of precipitate-containing, ultrafine-grained equiatomic CoCrFeMnNi high-entropy alloy with the addition of nitrogen was introduced. The introduction of nitrogen led to the formation of Cr- and N-rich precipitate of Cr2N on the low temperature-annealed N-CoCrFeMnNi. It was noticed that the presence of nitrogen in N-CoCrFeMnNi suppressed the formation of r-phase precipitate generally observed in low temperature-annealed CoCrFeMnNi system. Furthermore, it was observed that the addition of nitrogen could be utilized as a viable method in enhancing the mechanical properties of ultrafine-grained CoCrFeMnNi matrix, in which the addition of nitrogen successfully led to an improved yield strength and ultimate tensile strength of the ultrafine-grained CoCrFeMnNi system. (C) 2019 Elsevier B.V. All rights reserved.
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