Abstract
In this work, we have investigated the mechanical properties of Cu/Ta, Ag/Cu and Ag/Nb multilayers with different heterogeneous interfaces. The results suggest that when individual layer thickness (h) is larger than 5–10 nm, the hardness/strength of three different multilayer systems has the similar length scale effect with decreasing layer thickness, while when h ≤ 5 nm, the three multilayer systems show remarkably different plastic deformation behaviors. The strength curves exhibit the variation trends of unchanging, softening and increasing corresponding to Cu/Ta, Ag/Cu and Ag/Nb multilayers, respectively. The microstructure analysis shows that three kinds of multilayers have totally different interfacial structures, which lead to the different strengthening or softening mechanisms.
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Acknowledgments
This work was financially supported by the PAPD (No. 50831004), the Fundamental Research Funds for the Central Universities, the Innovation Fund of Jiangsu Province (No. BY2013072-06), the Natural Science Foundation of Jiangsu Province (No. 20141234), the National Natural Science Foundation of China (Nos. 51171078 and 51371096), and the State Key Program for Basic Research of China (No. 2010CB631004).
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Wei, MZ., Cao, ZH. & Meng, XK. Interfacial Structures Governed Plastic Deformation Behaviors in Metallic Multilayers. Acta Metall. Sin. (Engl. Lett.) 29, 199–204 (2016). https://doi.org/10.1007/s40195-016-0377-2
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DOI: https://doi.org/10.1007/s40195-016-0377-2