Fig. 2: Mechanical properties of nanocrystalline (NC) Cu and 16 vol% DMGr/Cu-60 h.
From: High strength and plasticity in disordered multilayer graphene reinforced copper composites
a Engineering stress-strain curves, the inset represents scanning electron microscope (SEM) morphology of the micropillar. b True stress-strain curves. c Snaps of the micropillar deformed at different strains. d Strain hardening rate Θ as a function of layer thickness (h) or grain size (d). e Strain hardening exponent n as a function of h or d. Here, the data of carbon nanotubes (CNTs)/Gr Cu, Cu-Cr, and Cu-Zr were obtained from the micropillar compression32,46,47,48, while Gr/Cu11, nanotwin (NT)-Cu, NC Cu, and ultrafine-grains (UFG) Cu23 came from the uniaxial tension.
