Spherical indentation response of a Ni double gyroid nanolattice

SCRIPTA MATERIALIA

卷:188

Article

Prusty, R. K.¹  Narayan, R. L.²  Scherer, M.³  Steiner, U.⁴  Deshpande, V. S.⁵  Fleck, N. A.⁵  Ramamurty, U.⁶ 

[1] Natl Inst Technol, Dept Met & Mat Engn, Rourkela 769008, India

[2] Indian Inst Technol, Dept Mat Sci & Engn, Delhi 110016, India

[3] Papierfabrik Louisenthal GmbH, Louisenthal 1, D-83703 Schwabisch Gmund, Germany

[4] Adolphe Merkle Inst, Chemin Verdiers, CH-1700 Fribourg, Switzerland

[5] Univ Cambridge, Dept Engn, Trumpington St, Cambridge CB2 1PZ, England

[6] Nanyang Technol Univ, Sch Mech & Aerosp Engn, 50 Nanyang Ave, Singapore 639798, Singapore

关键词: Cellular material;    Nanoindentation;    Hardness;    Plastic deformation;    Elastic modulus;   

DOI  :  10.1016/j.scriptamat.2020.07.011

来源: Elsevier

【 摘 要 】

The effect of indentation strain epsilon(i) 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 epsilon(i). Results reveal the progressive collapse of the DG lattice beneath the indenter. The measured values of H and extrapolated value of E at epsilon(i) = 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. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

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