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Mechanical properties and optimum layer thickness in an amorphous Ni-P/coarse-grained Ni bi-layered structure
Cao, R. Q.; Pan, J.; Lin, Y.; Li, Y.
2019-07-08
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume760Pages:458-468
AbstractIn 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.
KeywordBi-layered structure Amorphous layer thickness Extra elongation Back stress Deformation twinning
Indexed BySCI
Language英语
WOS IDWOS:000474501200045
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/80919
Collection中国科学院金属研究所
Recommended Citation
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.
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