Grain boundary decohesion by nanoclustering Ni and Cr separately in CrMnFeCoNi high-entropy alloys
文献类型：期刊论文
| 作者 | Ming, Kaisheng1,2; Li, Linlin3,4; Li, Zhiming3; Bi, Xiaofang1; Wang, Jian2 |
| 刊名 | SCIENCE ADVANCES
 |
| 出版日期 | 2019-12-01 |
| 卷号 | 5期号:12页码:7 |
| ISSN号 | 2375-2548 |
| DOI | 10.1126/sciadv.aay0639 |
| 通讯作者 | Bi, Xiaofang(bixf@buaa.edu.cn) ; Wang, Jian(jianwang@unl.edu) |
| 英文摘要 | 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. |
| 资助项目 | Science Fund for Creative Research Groups[61271043] ; Research Council at the University of Nebraska-Lincoln ; National Science Foundation[ECCS 1542182] ; Nebraska Research Initiative |
| WOS研究方向 | Science & Technology - Other Topics |
| 语种 | 英语 |
| WOS记录号 | WOS:000505069600066 |
| 出版者 | AMER ASSOC ADVANCEMENT SCIENCE |
| 资助机构 | Science Fund for Creative Research Groups ; Research Council at the University of Nebraska-Lincoln ; National Science Foundation ; Nebraska Research Initiative |
| 源URL | [http://ir.imr.ac.cn/handle/321006/136343]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Bi, Xiaofang; Wang, Jian |
| 作者单位 | 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 |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：金属研究所
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