Abstract
The mechanical response to indentation (including nano- and microindentation) has been investigated in Cu/Au and Cu/Cr multilayers with respective layer thickness ratios of 1:1 and 2:1, and individual layer thickness ranging from nanometer to submicrometer scale. It was found that the Cu/Cr multilayer has higher strength than the Cu/Au multilayer, although both multilayers have close Hall–Petch slope. Examination of indentationinduced deformation behavior shows that the Cu/Cr multilayer exhibits higher resistance to plastic deformation instability than the Cu/Au multilayer. Theoretical analysis indicates that the significant difference in mechanical response originates from the constituent layer configuration and interface structures, which impose distinguishing confining effect on dislocation activity.
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Li, Y.P., Zhu, X.F., Tan, J. et al. Comparative investigation of strength and plastic instability in Cu/Au and Cu/Cr multilayers by indentation. Journal of Materials Research 24, 728–735 (2009). https://doi.org/10.1557/jmr.2009.0092
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DOI: https://doi.org/10.1557/jmr.2009.0092