南方科技大学知识苑(SUSTech KC): Twin boundary-assisted precipitation of sigma phase in a high-entropy alloy

题名	Twin boundary-assisted precipitation of sigma phase in a high-entropy alloy
作者	Hou, Junhua1 ; Li, Jianjun 2; Lu, Wenjun1,3
通讯作者	Li, Jianjun; Lu, Wenjun
发表日期	2021-10-01
DOI	10.1016/j.matlet.2021.130198
发表期刊	MATERIALS LETTERS 影响因子和分区
ISSN	0167-577X
EISSN	1873-4979
卷号	300
摘要	We reveal a novel phenomenon, i.e., twin boundary-assisted precipitation of sigma phase in a non-equiatomic quinary high-entropy alloy (HEA) upon high-temperature annealing. According to systematic electron microscope studies, sigma phase is frequently observed at incoherent twin boundaries where 9R structures are usually formed. The diffusion of solutes and subsequent precipitation of sigma phase are mainly driven by the Gibbs free energy difference between the 9R structure and the adjacent matrix. The findings provide a fundamental understanding for the nature of sigma phase formation in polycrystalline HEAs.
关键词	High-entropy alloy Microstructure 9R structure Sigma phase Electron microscopy
相关链接	[来源记录]
收录类别	SCI ; EI
语种	英语
学校署名	第一 ; 通讯
资助项目	European Research Council under the EU's 7th Framework Programme (FP7/2007-2013)/ERC Grant[290998]
WOS研究方向	Materials Science ; Physics
WOS类目	Materials Science, Multidisciplinary ; Physics, Applied
WOS记录号	WOS:000672559000010
出版者	ELSEVIER
EI入藏号	20212410498490
EI主题词	Electron microscopes ; Entropy ; Free energy ; Gibbs free energy ; High-entropy alloys ; Microstructure ; Precipitation (chemical)
EI分类号	Metallurgy and Metallography:531 ; Chromium and Alloys:543.1 ; Iron Alloys:545.2 ; Thermodynamics:641.1 ; Chemical Operations:802.3 ; Materials Science:951
ESI学科分类	MATERIALS SCIENCE
来源库	Web of Science
引用统计	被引频次[WOS]：14
成果类型	期刊论文
条目标识符	http://sustech.caswiz.com/handle/2SGJ60CL/240252
专题	工学院_机械与能源工程系
作者单位	1.Southern Univ Sci & Technol, Dept Mech & Energy Engn, Shenzhen 518055, Peoples R China 2.Cent South Univ, Coll Mech & Elect Engn, Changsha 410083, Hunan, Peoples R China 3.Max Planck Inst Eisenforsch GmbH, Max Planck Str 1, D-40237 Dusseldorf, Germany
第一作者单位	机械与能源工程系
通讯作者单位	机械与能源工程系
第一作者的第一单位	机械与能源工程系
推荐引用方式 GB/T 7714	Hou, Junhua,Li, Jianjun,Lu, Wenjun. Twin boundary-assisted precipitation of sigma phase in a high-entropy alloy[J]. MATERIALS LETTERS,2021,300.
APA	Hou, Junhua,Li, Jianjun,&Lu, Wenjun.(2021).Twin boundary-assisted precipitation of sigma phase in a high-entropy alloy.MATERIALS LETTERS,300.
MLA	Hou, Junhua,et al."Twin boundary-assisted precipitation of sigma phase in a high-entropy alloy".MATERIALS LETTERS 300(2021).