Strong resistance to hydrogen embrittlement of high-entropy alloy | |
Pu Z(蒲卓); Chen Y(陈艳); Dai LH(戴兰宏) | |
发表期刊 | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING |
2018-10-24 | |
卷号 | 736页码:156-166 |
ISSN | 0921-5093 |
摘要 | 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. |
关键词 | High-entropy alloy Hydrogen embrittlement Cryogenic temperature Ductility Deformation microstructure |
DOI | 10.1016/j.msea.2018.08.101 |
URL | 查看原文 |
收录类别 | SCI ; EI |
语种 | 英语 |
WOS记录号 | WOS:000447573400017 |
关键词[WOS] | AUSTENITIC STAINLESS-STEELS ; INDUCED PLASTICITY STEEL ; X80 PIPELINE STEEL ; HIGH-STRENGTH ; TENSILE PROPERTIES ; FCC CRYSTALS ; IN-SITU ; METALS ; STRAIN ; SUSCEPTIBILITY |
WOS研究方向 | Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
WOS类目 | Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering |
项目资助者 | National 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] |
论文分区 | 一类 |
力学所作者排名 | 1 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://dspace.imech.ac.cn/handle/311007/78144 |
专题 | 非线性力学国家重点实验室 |
作者单位 | 1.[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 |
推荐引用方式 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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