南方科技大学知识苑(SUSTech KC): Deformable x phase induced deformation twins in a CoNiV medium entropy alloy

题名	Deformable x phase induced deformation twins in a CoNiV medium entropy alloy
作者	An, Fengchao; Hou, Junhua ; Liu, Jikui; Qian, Bingnan; Lu, Wenjun
通讯作者	Lu, Wenjun
发表日期	2023
DOI	10.1016/j.ijplas.2022.103509
发表期刊	INTERNATIONAL JOURNAL OF PLASTICITY 影响因子和分区
ISSN	0749-6419
EISSN	1879-2154
卷号	160
摘要	The degradation of ductility is obvious in low-temperature annealed face centered cubic (FCC) based alloys under bulk quasi-static tensile experiments due to intermetallic phase embrittlement. Here, we demonstrate a novel approach to overcome this loss of deformability by realizing brittle intermetallic phase (x) shearing and deformation twins in an equiatomic CoNiV medium entropy alloy (MEA) with high stacking fault energy. The brittle x phase not only contributes to high true ultimate tensile strengths (-1800-2000 MPa) by shearing, but also enhances the flow stress to approach the critical values for the onset of deformation twins (-1660-1750 MPa) in this MEA. Such shearing and twins in turn assist further work hardening and strengthening mechanisms that improve the deformability of MEA (uniform elongation -25-27%). As a result, the degradation of ductility caused by intermetallic phase embrittlement in this MEA can be recovered. The combination of deformable intermetallic phase and high stress deformation twins proposes a so far untapped strengthening mechanism, for enabling the design of FCC based alloys with improved mechanical properties.
关键词	Medium entropy alloy Deformation twin x phase shearing Mechanical properties Deformation mechanism
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	open research fund of Songshan Lake Materials Laboratory[2021SLABFK05] ; Shenzhen Science and Technology Program[JCYJ20210324104404012]
WOS研究方向	Engineering ; Materials Science ; Mechanics
WOS类目	Engineering, Mechanical ; Materials Science, Multidisciplinary ; Mechanics
WOS记录号	WOS:000918145200001
出版者	PERGAMON-ELSEVIER SCIENCE LTD
EI入藏号	20230513474619
EI主题词	Embrittlement ; Entropy ; High-entropy alloys ; Intermetallics ; Iron alloys ; Shearing ; Strain hardening ; Temperature ; Tensile strength
EI分类号	Metallurgy and Metallography:531 ; Metallurgy:531.1 ; Heat Treatment Processes:537.1 ; Chromium and Alloys:543.1 ; Iron Alloys:545.2 ; Metal Cutting:604.1 ; Thermodynamics:641.1 ; Materials Science:951
ESI学科分类	ENGINEERING
来源库	Web of Science
引用统计	被引频次[WOS]：27
成果类型	期刊论文
条目标识符	http://sustech.caswiz.com/handle/2SGJ60CL/430995
专题	工学院_机械与能源工程系
作者单位	Southern Univ Sci & Technol, Dept Mech & Energy Engn, Shenzhen 518055, Peoples R China
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	An, Fengchao,Hou, Junhua,Liu, Jikui,et al. Deformable x phase induced deformation twins in a CoNiV medium entropy alloy[J]. INTERNATIONAL JOURNAL OF PLASTICITY,2023,160.
APA	An, Fengchao,Hou, Junhua,Liu, Jikui,Qian, Bingnan,&Lu, Wenjun.(2023).Deformable x phase induced deformation twins in a CoNiV medium entropy alloy.INTERNATIONAL JOURNAL OF PLASTICITY,160.
MLA	An, Fengchao,et al."Deformable x phase induced deformation twins in a CoNiV medium entropy alloy".INTERNATIONAL JOURNAL OF PLASTICITY 160(2023).