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

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.
Authors:
ORCiD logo [1] ;  [1] ; ORCiD logo [2] ; ORCiD logo [2] ;  [1] ;  [1] ;  [1] ;  [1] ; ORCiD logo [2] ;  [2] ; ORCiD logo [3] ;  [4]
  1. Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Nuclear Engineering and Radiological Sciences
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
  3. 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
  4. Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Nuclear Engineering and Radiological Sciences, and Dept. of Materials Science and Engineering
Publication Date:
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
Materials Research Letters
Additional Journal Information:
Journal Volume: 6; Journal Issue: 10; Journal ID: ISSN 2166-3831
Publisher:
Taylor and Francis
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; High-entropy alloy; ion irradiation; void swelling; dislocation loops
OSTI Identifier:
1482443

Lu, Chenyang, Yang, Taini, Jin, Ke, Velisa, Gihan, Xiu, Pengyuan, Song, Miao, Peng, Qing, Gao, Fei, Zhang, Yanwen, Bei, Hongbin, Weber, William J., and Wang, Lumin. Enhanced void swelling in NiCoFeCrPd high-entropy alloy by indentation-induced dislocations. United States: N. p., Web. doi:10.1080/21663831.2018.1504136.
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. Enhanced void swelling in NiCoFeCrPd high-entropy alloy by indentation-induced dislocations. United States. doi:10.1080/21663831.2018.1504136.
Lu, Chenyang, Yang, Taini, Jin, Ke, Velisa, Gihan, Xiu, Pengyuan, Song, Miao, Peng, Qing, Gao, Fei, Zhang, Yanwen, Bei, Hongbin, Weber, William J., and Wang, Lumin. 2018. "Enhanced void swelling in NiCoFeCrPd high-entropy alloy by indentation-induced dislocations". United States. doi:10.1080/21663831.2018.1504136. https://www.osti.gov/servlets/purl/1482443.
@article{osti_1482443,
title = {Enhanced void swelling in NiCoFeCrPd high-entropy alloy by indentation-induced dislocations},
author = {Lu, Chenyang and Yang, Taini and Jin, Ke and Velisa, Gihan and Xiu, Pengyuan and Song, Miao and Peng, Qing and Gao, Fei and Zhang, Yanwen and Bei, Hongbin and Weber, William J. and Wang, Lumin},
abstractNote = {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.},
doi = {10.1080/21663831.2018.1504136},
journal = {Materials Research Letters},
number = 10,
volume = 6,
place = {United States},
year = {2018},
month = {8}
}

Works referenced in this record:

Nanostructured High-Entropy Alloys with Multiple Principal Elements: Novel Alloy Design Concepts and Outcomes
journal, May 2004
  • Yeh, J.-W.; Chen, S.-K.; Lin, S.-J.
  • Advanced Engineering Materials, Vol. 6, Issue 5, p. 299-303
  • DOI: 10.1002/adem.200300567