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Load effect on scratch micro-mechanisms of solution strengthened Compacted Graphite Irons
Department of Materials and Manufacturing, School of Engineering, Jönköping University, Sweden.ORCID iD: 0000-0003-2698-5445
Division of Production and Materials Engineering, Department of Mechanical Engineering, Lund University, Sweden.
Division of Production and Materials Engineering, Department of Mechanical Engineering, Lund University, Sweden.
Department of Materials and Manufacturing, School of Engineering, Jönköping University, Sweden.ORCID iD: 0000-0002-0101-0062
2019 (English)In: Tribology International, ISSN 0301-679X, E-ISSN 1879-2464, Vol. 133, p. 182-192Article in journal (Refereed) Published
Abstract [en]

This study investigates the scratch load effect, from 100 to 2000 mN, on micro-mechanisms involved during scratching. A pearlitic and three ferritic Compacted Graphite Irons (CGI) solution strengthened through addition of 3.66, 4.09, and 4.59 Si wt% were investigated. Good correlation was observed between hardness measurements, tensile testing, and scratch results explaining the influence of matrix characteristics on scratch behaviour for investigated alloys. A significant matrix deformation, change in frictional force and scratch coefficient of friction was observed by increase in scratch load. In all cases, microscratch depth and width increased significantly with load increasing, however pearlitic CGI showed most profound deformation, while the maximum and minimum scratch resistances were observed for high-Si ferritic and pearlitic CGI alloys, respectively.

Place, publisher, year, edition, pages
Elsevier, 2019. Vol. 133, p. 182-192
Keywords [en]
CGI, Si solution-strengthening, Scratch testing, Deformation micro-mechanisms during scratching
National Category
Metallurgy and Metallic Materials Tribology (Interacting Surfaces including Friction, Lubrication and Wear)
Identifiers
URN: urn:nbn:se:his:diva-21993DOI: 10.1016/j.triboint.2019.01.010ISI: 000458943500018Scopus ID: 2-s2.0-85059818887OAI: oai:DiVA.org:his-21993DiVA, id: diva2:1707876
Funder
Knowledge Foundation, 20170021Vinnova, 2012_137 2.4.2
Note

The authors gratefully acknowledge financial support from the Knowledge Foundation under ProSpekt scheme [GNR. 20170021], and Vinnova under FFI-programme [GRN. 2012_137 2.4.2]. MAN Diesel & Turbo Denmark, Swerea SWECAST, and Volvo Powertrain Skövde are also greatly acknowledged for their materials support.

Available from: 2022-11-01 Created: 2022-11-01 Last updated: 2022-11-01Bibliographically approved

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Ghasemi, RohollahJarfors, Anders E. W.

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