Fracture toughness determination by repetitive nano-impact testing in Cu/W nanomultilayers with length-scale-dependent films properties

Frutos, E., Karlik, M. and Polcar, T. (2016) Fracture toughness determination by repetitive nano-impact testing in Cu/W nanomultilayers with length-scale-dependent films properties. Procedia Structural Integrity, 2, 1391-1404. (doi:10.1016/j.prostr.2016.06.177).

Record type: Article

Abstract

Nanoscale metallic multilayers based on Cu/W have been considered as a potential material for structural applications in nuclear reactors and for the cladding of storage tanks for advanced fuels kept at high temperatures. The understanding of how mechanical properties change in relation to periodicity, λ, is required in order to use Cu/W nano-multilayers as a protective coating against radiation damage. The aim of this work is to demonstrate the feasibility of using the repetitive-nano-impact technique to obtain quantitative fracture toughness, K _C , values in nano-multilayers and assess its variation as a function of λ.

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Published date: 2016

Additional Information: Funding Information: The authors wish to express their thanks for the financial support of the European Commission through the project RADINTERFACES (Grant Agreement Number 263273) and the Czech Science Foundation through the project 14-32801P. Publisher Copyright: Copyright © 2016 The Authors. Published by Elsevier B.V. Copyright: Copyright 2019 Elsevier B.V., All rights reserved.

Keywords: Dynamic fracture, Fracture toughness, Impact testing, Layered material, Stress intensity factor