Demystifying the sluggish diffusion effect in high entropy alloys

Juliusz Dąbrowa , Marek Zajusz , Witold Kucza , Grzegorz Cieślak , Katarzyna Berent , Tomasz Czeppe , Tadeusz Kulik , Marek Danielewski

Abstract

Interdiffusion studies in Co-Cr-Fe-Mn-Ni, Co-Fe-Mn-Ni, Co-Cr-Fe-Ni, and Co-Cr-Mn-Ni, as well as a reevaluation of the previous results obtained for Al-Co-Cr-Fe-Ni, were conducted. In the experimental part, diffusion couples were annealed at four different temperatures: 1230, 1270, 1310 and 1350 K for each system. Then, the results were evaluated with use of the optimization-based technique, combined with the Miedema's thermodynamic description, what allowed obtaining of tracer diffusion coefficients for all elements in all considered systems. The correctness of the applied approach was tested on the example of Co-Cr-Fe-Mn-Ni system, showing very good agreement of determined tracer diffusivities with the values obtained by other authors. Obtained values of diffusivities were compared with the available data for a number of conventional binary and ternary systems. No signs of diffusion retardation were observed in the absolute temperature scale. In the case of temperature scale normalized with respect to the melting point, an abnormal behavior, previously attributed to the HEAs' sluggish diffusion effect was observed. However, it occurred only for alloys with prominent manganese content and was completely independent of the number of components, being just as likely to occur in binary systems as in HEAs. Therefore, the alleged sluggishness of diffusion in HEAs should be treated just as a result of specific compositions of the previously studied alloys and cannot be generalized for all high entropy systems.
Author Juliusz Dąbrowa - AGH University of Science and Technology (AGH) [AGH University of Science and Technology (AGH)]
Juliusz Dąbrowa,,
-
- Akademia Górniczo-Hutnicza
, Marek Zajusz - AGH University of Science and Technology (AGH) [AGH University of Science and Technology (AGH)]
Marek Zajusz,,
-
- Akademia Górniczo-Hutnicza
, Witold Kucza - AGH University of Science and Technology (AGH) [AGH University of Science and Technology (AGH)]
Witold Kucza,,
-
- Akademia Górniczo-Hutnicza
, Grzegorz Cieślak (FMSE / DCFM)
Grzegorz Cieślak,,
- Division of Construction and Functional Materials
, Katarzyna Berent - Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie (AGH) [AGH University of Science and Technology (AGH)]
Katarzyna Berent,,
-
- Akademia Górniczo-Hutnicza
, Tomasz Czeppe - Instytut Metalurgii i Inżynierii Materiałowej im. Aleksandra Krupkowskiego Polskiej Akademii Nauk (IMIM) [Polish Academy of Sciences (PAN)] [Instytut Metalurgii i Inzynierii Materialowej Polskiej Akademii Nauk]
Tomasz Czeppe,,
-
-
, Tadeusz Kulik (FMSE / DCFM)
Tadeusz Kulik,,
- Division of Construction and Functional Materials
, Marek Danielewski - AGH University of Science and Technology (AGH) [AGH University of Science and Technology (AGH)]
Marek Danielewski,,
-
- Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Journal seriesJournal of Alloys and Compounds, ISSN 0925-8388
Issue year2019
Vol783
Pages193-207
Publication size in sheets0.7
Keywords in EnglishHigh entropy alloys, Diffusion, Computer simulations, Thermodynamic modeling
ASJC Classification2210 Mechanical Engineering; 2211 Mechanics of Materials; 2505 Materials Chemistry; 2506 Metals and Alloys
DOIDOI:10.1016/j.jallcom.2018.12.300
URL https://www.sciencedirect.com/science/article/pii/S0925838818348576?via%3Dihub
Languageen angielski
File
Demystifying the sluggish diffusion effect in high entropy alloys.pdf 3.34 MB
Score (nominal)100
Score sourcejournalList
ScoreMinisterial score = 100.0, 09-06-2020, ArticleFromJournal
Publication indicators WoS Citations = 5; Scopus Citations = 19; Scopus SNIP (Source Normalised Impact per Paper): 2018 = 1.386; WoS Impact Factor: 2018 = 4.175 (2) - 2018=3.624 (5)
Citation count*
Cite
Share Share

Get link to the record


* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
Back
Confirmation
Are you sure?