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

文献类型：期刊论文

作者Cao, R. Q.1,2; Pan, J.2; Lin, Y.2; Li, Y.2
刊名MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
出版日期2019-07-08
卷号760页码:458-468
ISSN号0921-5093
关键词Bi-layered structure Amorphous layer thickness Extra elongation Back stress Deformation twinning
DOI10.1016/j.msea.2019.05.105
通讯作者Pan, J.(jiepan@imr.ac.cn) ; Li, Y.(liyi@imr.ac.cn)
英文摘要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.
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
语种英语
出版者ELSEVIER SCIENCE SA
WOS记录号WOS:000474501200045
资助机构National Natural Science Foundation of China ; Joint Foundation of Liaoning Province National Science Foundation ; Shenyang National Laboratory for Materials Science
源URL[http://ir.imr.ac.cn/handle/321006/134387]  
专题金属研究所_中国科学院金属研究所
通讯作者Pan, J.; Li, Y.
作者单位1.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China
2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, 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.

入库方式： OAI收割

来源：金属研究所

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