Spherical indentation response of a Ni double gyroid nanolattice. (November 2020)

• Record Type: Journal Article
• Authors: Prusty, R.K.; Narayan, R.L.; Scherer, M.; Steiner, U.; Deshpande, V.S.; Fleck, N.A.; Ramamurty, U.
• Is Part Of: Scripta materialia. Number 188(2020)
• Page Start: 64
• Page End: 68
• Publication Date: 2020-11
• Subjects: Cellular material -- Nanoindentation -- Hardness -- Plastic deformation -- Elastic modulus; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2020.07.011
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: The effect of indentation strain εi upon hardness H and elastic modulus E of a Ni Double Gyroid (DG) nanolattice was investigated using a spherically-tipped nanoindenter. H remains invariant, while E decreases linearly, with increasing εi . Results reveal the progressive collapse of the DG lattice beneath the indenter. The measured values of H and extrapolated value of E at εi = 0 were used to estimate the yield strength and elastic modulus of the Ni cell walls. The latter was compared with the ideal strength of Ni, nanocrystalline films and of sub-100 nm diameter single crystals. Graphical abstract: Image, graphical abstract