Effect of interstitial carbon on the evolution of early-stage irradiation damage in equi-atomic FeMnNiCoCr high-entropy alloys

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http://hdl.handle.net/10138/313846

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Lu , E , Makkonen , I , Mizohata , K , Li , Z , Räisänen , J & Tuomisto , F 2020 , ' Effect of interstitial carbon on the evolution of early-stage irradiation damage in equi-atomic FeMnNiCoCr high-entropy alloys ' , Journal of Applied Physics , vol. 127 , no. 2 , 025103 . https://doi.org/10.1063/1.5130748

Title: Effect of interstitial carbon on the evolution of early-stage irradiation damage in equi-atomic FeMnNiCoCr high-entropy alloys
Author: Lu, Eryang; Makkonen, Ilja; Mizohata, Kenichiro; Li, Zhiming; Räisänen, Jyrki; Tuomisto, Filip
Contributor: University of Helsinki, Materials Physics
University of Helsinki, Materials Physics
University of Helsinki, Materials Physics
University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
Date: 2020-01-14
Language: eng
Number of pages: 7
Belongs to series: Journal of Applied Physics
ISSN: 0021-8979
URI: http://hdl.handle.net/10138/313846
Abstract: Owing to their excellent radiation tolerance, some of the high-entropy alloys (HEAs) are considered as potential candidates for structural materials in extreme conditions. In order to shed light on the early-stage irradiation damage in HEAs, we performed positron annihilation spectroscopy on hydrogen implanted equiatomic FeMnNiCoCr and interstitial carbon-containing FeMnNiCoCr HEAs. We reveal primary damage as monovacancies in low dose irradiated HEAs. The enhancement of Frenkel pair recombination by C addition is observed in C-containing HEAs. In addition, the C interstitials suppress the vacancy cluster formation in high dose irradiated HEAs.
Subject: TOTAL-ENERGY CALCULATIONS
POSITRON-ANNIHILATION
VACANCY CLUSTERS
DEFECTS
SEMICONDUCTORS
IMPURITIES
DENSITIES
NI
114 Physical sciences
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