Enhanced void swelling in NiCoFeCrPd high-entropy alloy by indentation-induced dislocations. Issue 10 (3rd October 2018)

• Record Type: Journal Article
• Authors: 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
• Is Part Of: Materials research letters. Volume 6:Issue 10(2018)
• Page Start: 584
• Page End: 591
• Publication Date: 2018-10-03
• Subjects: High-entropy alloy -- ion irradiation -- void swelling -- dislocation loops; Materials science -- Research -- Periodicals; Biomedical materials -- Research -- Periodicals; Composite materials -- Research -- Periodicals; Biomedical materials -- Research; Composite materials -- Research; Materials science -- Research; Periodicals; 620.1105
• DOI: 10.1080/21663831.2018.1504136
• Languages: English
• ISSNs: 2166-3831

Abstract

ABSTRACT: 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. Compared to another HEA NiCoFeCrMn, NiCoFeCrPd has a smaller loop size and higher loop density due to the stronger lattice distortion. GRAPHICAL ABSTRACT: IMPACT STATEMENT: Swelling behavior in a newly designed high-entropy alloy NiCoFeCrPd has been studied for the first time. Void swelling is enhanced with increasing density of pre-existing dislocations in NiCoFeCrPd.