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Grain boundary decohesion by nanoclustering Ni and Cr separately in CrMnFeCoNi high-entropy alloys
Ming, Kaisheng1,2; Li, Linlin3,4; Li, Zhiming3; Bi, Xiaofang1; Wang, Jian2
Corresponding AuthorBi, Xiaofang(bixf@buaa.edu.cn) ; Wang, Jian(jianwang@unl.edu)
2019-12-01
Source PublicationSCIENCE ADVANCES
ISSN2375-2548
Volume5Issue:12Pages:7
AbstractThe loss of ductility with temperature has been widely observed in tensile tests of single-phase face-centered cubic structured high-entropy alloys (HEAs). However, the fundamental mechanism for such a ductility loss remains unknown. Here, we show that ductility loss in the CrMnFeCoNi HEA upon deformation at intermediate temperatures is correlated with cracking at grain boundaries (GBs). Nanoclustering Cr, Ni, and Mn separately at GBs, as detected by atom probe tomography, reduces GB cohesion and promotes crack initiation along GBs. We further demonstrated a GB segregation engineering strategy to avoid ductility loss by shifting the fast segregation of principal elements from GBs into preexisting Cr-rich secondary phases. We believe that GB decohesion by nanoclustering multiprincipal elements is a common phenomenon in HEAs. This study not only provides insights into understanding ductility loss but also offers a strategy for tailoring ductility-temperature relations in HEAs.
Funding OrganizationScience Fund for Creative Research Groups ; Research Council at the University of Nebraska-Lincoln ; National Science Foundation ; Nebraska Research Initiative
DOI10.1126/sciadv.aay0639
Indexed BySCI
Language英语
Funding ProjectScience Fund for Creative Research Groups[61271043] ; Research Council at the University of Nebraska-Lincoln ; National Science Foundation[ECCS 1542182] ; Nebraska Research Initiative
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
WOS IDWOS:000505069600066
PublisherAMER ASSOC ADVANCEMENT SCIENCE
Citation statistics
Cited Times:18[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/136344
Collection中国科学院金属研究所
Corresponding AuthorBi, Xiaofang; Wang, Jian
Affiliation1.Beihang Univ, Key Lab Aerosp Mat & Performance, Minist Educ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China
2.Univ Nebraska, Mech & Mat Engn, Lincoln, NE 68588 USA
3.Max Planck Inst Eisenforsch GmbH, Max Planck Str 1, D-40237 Dusseldorf, Germany
4.Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China
Recommended Citation
GB/T 7714
Ming, Kaisheng,Li, Linlin,Li, Zhiming,et al. Grain boundary decohesion by nanoclustering Ni and Cr separately in CrMnFeCoNi high-entropy alloys[J]. SCIENCE ADVANCES,2019,5(12):7.
APA Ming, Kaisheng,Li, Linlin,Li, Zhiming,Bi, Xiaofang,&Wang, Jian.(2019).Grain boundary decohesion by nanoclustering Ni and Cr separately in CrMnFeCoNi high-entropy alloys.SCIENCE ADVANCES,5(12),7.
MLA Ming, Kaisheng,et al."Grain boundary decohesion by nanoclustering Ni and Cr separately in CrMnFeCoNi high-entropy alloys".SCIENCE ADVANCES 5.12(2019):7.
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