Grain boundary decohesion by nanoclustering Ni and Cr separately in CrMnFeCoNi high-entropy alloys

doi:10.1126/sciadv.aay0639

CORC > 金属研究所 > 中国科学院金属研究所

	Grain boundary decohesion by nanoclustering Ni and Cr separately in CrMnFeCoNi high-entropy alloys
	Ming, Kaisheng 2,3; Li, Linlin 1,4; Li, Zhiming 4; Bi, Xiaofang 2; Wang, Jian 3
刊名	SCIENCE ADVANCES
	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
出版者	AMER ASSOC ADVANCEMENT SCIENCE
WOS记录号	WOS:000505069600066
资助机构	Science Fund for Creative Research Groups ; Research Council at the University of Nebraska-Lincoln ; National Science Foundation ; Nebraska Research Initiative
内容类型	期刊论文
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.Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China 2.Beihang Univ, Key Lab Aerosp Mat & Performance, Minist Educ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China 3.Univ Nebraska, Mech & Mat Engn, Lincoln, NE 68588 USA 4.Max Planck Inst Eisenforsch GmbH, Max Planck Str 1, D-40237 Dusseldorf, Germany
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.