| 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 Author | Bi, Xiaofang(bixf@buaa.edu.cn) ; Wang, Jian(jianwang@unl.edu) |
| 2019-12-01 | |
| Source Publication | SCIENCE ADVANCES
 |
| ISSN | 2375-2548 |
| Volume | 5Issue:12Pages:7 |
| Abstract | The 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 Organization | Science Fund for Creative Research Groups ; Research Council at the University of Nebraska-Lincoln ; National Science Foundation ; Nebraska Research Initiative |
| DOI | 10.1126/sciadv.aay0639 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | Science Fund for Creative Research Groups[61271043] ; Research Council at the University of Nebraska-Lincoln ; National Science Foundation[ECCS 1542182] ; Nebraska Research Initiative |
| WOS Research Area | Science & Technology - Other Topics |
| WOS Subject | Multidisciplinary Sciences |
| WOS ID | WOS:000505069600066 |
| Publisher | AMER ASSOC ADVANCEMENT SCIENCE |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/136346 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Bi, Xiaofang; Wang, Jian |
| Affiliation | 1.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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