Enhanced void swelling in NiCoFeCrPd high-entropy alloy by indentation-induced dislocations

Lu, Chenyang; Yang, Taini; Jin, Ke; Velisa, Gihan; Xiu, Pengyuan; Song, Miao; Peng, Qing; Gao, Fei; Zhang, Yanwen; Bei, Hongbin; Weber, William J.; Wang, Lumin

doi:10.1080/21663831.2018.1504136

Enhanced void swelling in NiCoFeCrPd high-entropy alloy by indentation-induced dislocations

Journal Article · Wed Aug 08 00:00:00 EDT 2018 · Materials Research Letters

DOI:https://doi.org/10.1080/21663831.2018.1504136· OSTI ID:1482443

^[1]; Yang, Taini ^[1]; ^[2]; ^[2]; Xiu, Pengyuan ^[1]; Song, Miao ^[1]; Peng, Qing ^[1]; Gao, Fei ^[1]; ^[2]; Bei, Hongbin ^[2]; ^[3]; Wang, Lumin ^[4]

Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Nuclear Engineering and Radiological Sciences
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division; Univ. of Tennessee, Knoxville, TN (United States). Dept. of Materials Science and Engineering
Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Nuclear Engineering and Radiological Sciences, and Dept. of Materials Science and Engineering

The role of dislocations on ion irradiation-induced void formation is studied in a high-entropy alloy (HEA) NiCoFeCrPd. Despite previous observations that show high-entropy alloys are swelling resistant due to a high defect recombination rate, the swelling is enhanced with increasing density of pre-existing dislocations at low strain levels that shortened transient duration before the onset of void swelling. Under certain irradiation conditions, a high density of dislocations may carry the material closer to the sink-dominated regime. Finally, compared to another HEA NiCoFeCrMn, NiCoFeCrPd has a smaller loop size and higher loop density due to the stronger lattice distortion.

View Accepted Manuscript (DOE)

Research Organization:: Energy Frontier Research Centers (EFRC) (United States). Energy Dissipation to Defect Evolution (EDDE); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1482443

Journal Information:: Materials Research Letters, Journal Name: Materials Research Letters Journal Issue: 10 Vol. 6; ISSN 2166-3831

Publisher:: Taylor and FrancisCopyright Statement

Country of Publication:: United States

Language:: English

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36 MATERIALS SCIENCE
High-entropy alloy
dislocation loops
ion irradiation
void swelling

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