Journal
SCRIPTA MATERIALIA
Volume 156, Issue -, Pages 80-84Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2018.06.041
Keywords
High entropy alloys; Radiation induced segregation; Grain boundaries; Chemical complexity; Radiation damage
Categories
Funding
- US National Science Foundation [1429661, 1105681]
- US Department of Energy, Office of Basic Energy Sciences [DE-SC0008274]
- National Nuclear Security Administration of the U.S. DOE [DE-AC52-06NA25396]
- National Natural Science Foundation of China [50471025, 51470124]
- Center for Nanophase Materials Sciences, DOE Office of Science User Facility
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High entropy alloys have gained significant interest due to several unique properties including enhanced radiation resistance. In this work, radiation induced segregation, a key phenomenon observed in alloys under irradiation, is examined for the first time at high angle grain boundaries under Ni heavy ion irradiation in the CoCrFeNiMn alloy. Our experimental study indicates significant Mn depletion and Co and Ni enrichment at grain boundaries. The segregation is discussed in the context of a proposed vacancy dominated radiation induced segregation mechanism and compared to existing models in conventional single core component alloys including stainless steels. (C) 2018 Published by Elsevier Ltd on behalf of Acta Materialia Inc.
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