Title Micro-scale impact resistance of coatings on hardened tool steel and cemented carbide
Authors Beake, B. D. , Isern, L. , ENDRINO ARMENTEROS, JOSÉ LUIS, Liskiewicz, T. W. , Shi, X.
External publication Si
Means Mater. Lett.
Scope Article
Nature Científica
JCR Quartile 2
SJR Quartile 2
JCR Impact 3.57400
SJR Impact 0.65800
Web https://www.scopus.com/inward/record.uri?eid=2-s2.0-85096642315&doi=10.1016%2fj.matlet.2020.129009&partnerID=40&md5=8e59bb29e1f6cd0ece67308209b82b64
Publication date 01/02/2021
ISI 000598396000026
Scopus Id 2-s2.0-85096642315
DOI 10.1016/j.matlet.2020.129009
Abstract Micro-impact, a novel accelerated test method for assessing coating durability under repetitive contact, has been developed to concentrate impact-induced stresses close to the interfaces in coating systems. Test results are described for carbon coatings on hardened tool steel and nitride-based coatings on cemented carbide. At higher load it was possible to show the increasing contribution of the substrate properties (load support and ductility) to the coating system response whilst retaining high sensitivity to the coating properties. Hard and elastic carbon coatings on hardened tool steel displayed very low impact resistance under these conditions. Relatively soft carbon-based coatings with more metallic character and high plasticity (low H/E) deposited on hard but tough tool steel were resistant to radial cracking and lateral fracture at high load. Lateral fracture at high load and extensive substrate cracking was observed at higher load for hard nitrides on cemented carbide. The micro-impact test has the potential to significantly speed up the pace of coating system selection for durability under highly loaded repetitive contacts, as occur in coatings applications in engine components and in discontinuous cutting operations. (c) 2020 Elsevier B.V. All rights reserved.
Keywords Thin films; Physical vapour deposition; Fatigue; Wear and tribology
Universidad Loyola members

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