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Strong resistance to hydrogen embrittlement of high-entropy alloy
Pu Z(蒲卓); Chen Y(陈艳); Dai LH(戴兰宏)
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
2018-10-24
Volume736Pages:156-166
ISSN0921-5093
Abstract

The resistance to hydrogen embrittlement (HE) of CrMnFeCoNi high-entropy alloy (HEA) at both room and cryogenic temperatures was examined through tensile experiments on specimens hydrogenated via cathodic electrochemical charging method. Two representative steels, i.e. 316L stainless steel (SS) and X80 pipeline steel (PS), were chosen for comparison due to their similar main constituent elements to CrMnFeCoNi HEA. Results show that the hydrogen pre-charged CrMnFeCoNi HEA has the smallest loss of ductility among the three materials at room temperature, while displays no reduction of elongation at 77 K, compared with the uncharged one. Fracture surfaces at both room and cryogenic temperatures of hydrogen pre-charged CrMnFeCoNi HEA are mainly composed of dimples, indicating ductile fractures, while brittle characteristics occur in pre-charged 316L SS and X80 PS. Typical deformation microstructure of the hydrogen pre-charged CrMnFeCoNi HEA at room temperature is tangled dislocations instead of highly dense dislocation walls (HDDWs) found in the pre-charged 316L SS. At 77 K, more deformation twins are formed in the both materials. Reasons for a higher resistance to HE of CrMnFeCoNi HEA at room temperature are attributed to the formation of less hydrogen trapping sites, thus a lower degree of hydrogen enrichment than 316L SS. While at 77 K, the atomic hydrogen is not able to promptly accumulate near these trapping sites due to its slow diffusion rate, which leads to strong HE resistance.

KeywordHigh-entropy alloy Hydrogen embrittlement Cryogenic temperature Ductility Deformation microstructure
DOI10.1016/j.msea.2018.08.101
URL查看原文
Indexed BySCI ; EI
Language英语
WOS IDWOS:000447573400017
WOS KeywordAUSTENITIC STAINLESS-STEELS ; INDUCED PLASTICITY STEEL ; X80 PIPELINE STEEL ; HIGH-STRENGTH ; TENSILE PROPERTIES ; FCC CRYSTALS ; IN-SITU ; METALS ; STRAIN ; SUSCEPTIBILITY
WOS Research AreaNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS SubjectScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
Funding OrganizationNational Key Research and Development Program of China [2017YFB0702003] ; NSFC [11472287, 11790292, 11572324] ; Strategic Priority Research Program of the Chinese Academy of Sciences [XDB22040302, XDB22040303] ; Key Research Program of Frontier Sciences [QYZDJSSW-JSC011]
Classification一类
Ranking1
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Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/78144
Collection非线性力学国家重点实验室
Affiliation1.[Pu, Z.
2.Chen, Y.
3.Dai, L. H.] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
4.Dai, L. H.] Univ Chinese Acad Sci, Sch Engn Sci, Beijing 101408, Peoples R China
5.[Dai, L. H.] Beijing Inst Technol, State Key Lab Explos Sci & Technol, Beijing 100081, Peoples R China
Recommended Citation
GB/T 7714
Pu Z,Chen Y,Dai LH. Strong resistance to hydrogen embrittlement of high-entropy alloy[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2018,736:156-166.
APA Pu Z,Chen Y,&Dai LH.(2018).Strong resistance to hydrogen embrittlement of high-entropy alloy.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,736,156-166.
MLA Pu Z,et al."Strong resistance to hydrogen embrittlement of high-entropy alloy".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 736(2018):156-166.
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