Mechanical properties and optimum layer thickness in an amorphous Ni-P/coarse-grained Ni bi-layered structure

doi:10.1016/j.msea.2019.05.105

IMR OpenIR

	Mechanical properties and optimum layer thickness in an amorphous Ni-P/coarse-grained Ni bi-layered structure
	Cao, R. Q.1,2; Pan, J.1; Lin, Y.1; Li, Y.1
通讯作者	Pan, J.(jiepan@imr.ac.cn) ; Li, Y.(liyi@imr.ac.cn)
	2019-07-08
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	760 页码:458-468
摘要	In the present study, we systematically investigate the mechanical behavior of a bi-layered structure consisting of a coarse-grained (CG) Ni substrate plus an amorphous Ni-P surface layer. It is found that a desirable combination of high strength and high ductility can be attained by tailoring the thickness of Ni-P layer. An optimal layer thickness of similar to 6.5 mu m is discovered, where the specimen having a bi-layered structure exhibits a yield strength of 236 MPa and an uniform elongation of 32.6%, which are 1.13 and 1.11 times of those in the corresponding coarse-grained Ni. Experimental observations and finite element modeling (FEM) simulations reveal that this optimum bi-layered structure under tension induces large stress and strain gradients in the CG Ni substrate, resulting in the significant back stress and deformation twinning. Therefore, the plastic deformation can be more effectively accommodated, leading to the observed extra uniform elongation in the bi-layered structure.
关键词	Bi-layered structure Amorphous layer thickness Extra elongation Back stress Deformation twinning
资助者	National Natural Science Foundation of China ; Joint Foundation of Liaoning Province National Science Foundation ; Shenyang National Laboratory for Materials Science
DOI	10.1016/j.msea.2019.05.105
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51471165] ; Joint Foundation of Liaoning Province National Science Foundation ; Shenyang National Laboratory for Materials Science[2015021007]
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000474501200045
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：21[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/134390
专题	中国科学院金属研究所
通讯作者	Pan, J.; Li, Y.
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China
推荐引用方式 GB/T 7714	Cao, R. Q.,Pan, J.,Lin, Y.,et al. Mechanical properties and optimum layer thickness in an amorphous Ni-P/coarse-grained Ni bi-layered structure[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2019,760:458-468.
APA	Cao, R. Q.,Pan, J.,Lin, Y.,&Li, Y..(2019).Mechanical properties and optimum layer thickness in an amorphous Ni-P/coarse-grained Ni bi-layered structure.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,760,458-468.
MLA	Cao, R. Q.,et al."Mechanical properties and optimum layer thickness in an amorphous Ni-P/coarse-grained Ni bi-layered structure".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 760(2019):458-468.