Back to Search
Start Over
Enhancement of vacancy diffusion by C and N interstitials in the equiatomic FeMnNiCoCr high entropy alloy.
- Source :
-
Acta Materialia . Aug2021, Vol. 215, pN.PAG-N.PAG. 1p. - Publication Year :
- 2021
-
Abstract
- We present evidence of homogenization of atomic diffusion properties caused by C and N interstitials in an equiatomic single-phase high entropy alloy (FeMnNiCoCr). This phenomenon is manifested by an unexpected interstitial-induced reduction and narrowing of the directly experimentally determined migration barrier distribution of mono-vacancy defects introduced by particle irradiation. Our observation by positron annihilation spectroscopy is explained by state-of-the-art theoretical calculations that predict preferential localization of C/N interstitials in regions rich in Mn and Cr, leading to a narrowing and reduction of the mono-vacancy size distribution in the random alloy. This phenomenon is likely to have a significant impact on the mechanical behavior under irradiation, as the local variations in elemental motion have a profound effect on the solute strengthening in high entropy alloys. [Display omitted] [ABSTRACT FROM AUTHOR]
- Subjects :
- *POSITRON annihilation
*ENTROPY
*ALLOYS
*DISTRIBUTION (Probability theory)
Subjects
Details
- Language :
- English
- ISSN :
- 13596454
- Volume :
- 215
- Database :
- Academic Search Index
- Journal :
- Acta Materialia
- Publication Type :
- Academic Journal
- Accession number :
- 151856881
- Full Text :
- https://doi.org/10.1016/j.actamat.2021.117093