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Evaluation of Radiation Response in CoCrFeCuNi High-Entropy Alloys
Wang Y; Zhang K(张坤); Feng YH(冯义辉); Li YS; Tang WQ; Wei BC(魏炳忱)
Source PublicationENTROPY
2018-11-01
Volume20Issue:11Pages:Ar-835
ISSN1099-4300
AbstractCoCrFeCuNi high-entropy alloys (HEAs) prepared by arc melting were irradiated with a 100 keV He+ ion beam. Volume swelling and hardening induced by irradiation were evaluated. When the dose reached 5.0 x 10(17) ions/cm(2), the Cu-rich phases exhibited more severe volume swelling compared with the matrix phases. This result indicated that the Cu-rich phases were favorable sites for the nucleation and gathering of He bubbles. X-ray diffraction indicated that all diffraction peak intensities decreased regularly. This reduction suggested loosening of the irradiated layer, thereby reducing crystallinity, under He+ ion irradiation. The Nix-Gao model was used to fit the measured hardness in order to obtain a hardness value H-0 that excludes the indentation size effect. At ion doses of 2.5 x 10(17) ions/cm(2) and 5.0 x 10(17) ions/cm(2), the HEAs showed obvious hardening, which could be attributed to the formation of large amounts of irradiation defects. At the ion dose of 1.0 x 10(18) ions/cm(2), hardening was reduced, owing to the exfoliation of the original irradiation layer, combined with recovery induced by long-term thermal spike. This study is important to explore the potential uses of HEAs under extreme irradiation conditions.
Keywordhigh-entropy alloy ion irradiation hardening behavior volume swelling
DOI10.3390/e20110835
URL查看原文
Indexed BySCI
Language英语
WOS IDWOS:000451308800027
WOS KeywordPRINCIPAL-ELEMENT ALLOYS ; ION-IRRADIATION ; FATIGUE BEHAVIOR ; SOLID-SOLUTION ; VISCOUS-FLOW ; HELIUM ; NANOINDENTATION ; MICROSTRUCTURE ; TEMPERATURE ; RELAXATION
WOS Research AreaPhysics, Multidisciplinary
WOS SubjectPhysics
Funding OrganizationNational Natural Science Foundation of China [51401028, 51271193, 11402277, 11790292] ; Strategic Priority Research Program of the Chinese Academy of Sciences [XDB22040303]
Classification二类
Ranking1
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/78153
Collection国家微重力实验室
非线性力学国家重点实验室
Affiliation1.Chinese Acad Sci, Inst Mech, Key Lab Micrograv, Natl Micrograv Lab, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Wang Y,Zhang K,Feng YH,et al. Evaluation of Radiation Response in CoCrFeCuNi High-Entropy Alloys[J]. ENTROPY,2018,20(11):Ar-835.
APA Wang Y,张坤,冯义辉,Li YS,Tang WQ,&魏炳忱.(2018).Evaluation of Radiation Response in CoCrFeCuNi High-Entropy Alloys.ENTROPY,20(11),Ar-835.
MLA Wang Y,et al."Evaluation of Radiation Response in CoCrFeCuNi High-Entropy Alloys".ENTROPY 20.11(2018):Ar-835.
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