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Scratch behaviour of silicon solid solution strengthened ferritic compacted graphite iron (CGI)
Jönköping University, School of Engineering, JTH, Materials and Manufacturing.ORCID iD: 0000-0003-2698-5445
Jönköping University, School of Engineering, JTH, Materials and Manufacturing.ORCID iD: 0000-0002-0101-0062
2018 (English)In: Materials Science Forum, ISSN 0255-5476, E-ISSN 1662-9752, p. 318-325Article in journal (Refereed) Published
Abstract [en]

The present study focuses on scratch behaviour of a conventional pearlitic and a number of solid solution strengthened ferritic Compacted Graphite Iron (CGI) alloys. This was done by employing a single-pass microscratch test using a sphero-conical diamond indenter under different constant normal load conditions. Matrix solution hardening was made by alloying with different contents of Si; (3.66, 4.09 and 4.59 wt%. Si) which are named as low-Si, medium-Si and high-Si ferritic CGI alloys, respectively. A good correlation between the tensile and scratch test results was observed explaining the influence of CGI’s matrix characteristics on scratch behaviour both for pearlitic and fully ferritic solution strengthened ones. Both the scratch depth and scratch width showed strong tendency to increase with increasing the normal load, however the pearlitic one showed more profound deformation compared to the solution strengthened CGI alloys. Among the investigated alloys, the maximum and minimum scratch resistance were observed for high-Si ferritic CGI and pearlitic alloys, respectively. It was confirmed by the scratched surfaces analysed using Scanning Electron Microscopy (SEM) as well. In addition, the indenter’s depth of penetration value (scratch depth) was found as a suitable measure to ascertain the scratch resistance of CGI alloys. 

Place, publisher, year, edition, pages
Trans Tech Publications, 2018. p. 318-325
Keywords [en]
Abrasion, CGI, Scratch resistance, Scratch testing, Silicon solution strengthening, Cast iron, Ferrite, Graphite, Pearlite, Scanning electron microscopy, Solid solutions, Compacted graphite iron, Diamond indenter, Good correlations, Micro-scratch test, Penetration values, Solution strengthening, Silicon alloys
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:hj:diva-41279DOI: 10.4028/www.scientific.net/MSF.925.318ISI: XYZScopus ID: 2-s2.0-85050016378ISBN: 9783035710557 (print)OAI: oai:DiVA.org:hj-41279DiVA, id: diva2:1242568
Conference
11th International Symposium on the Science and Processing of Cast Iron, SPCI-XI 2017, Jönköping, Sweden, 4-7 September 2017
Funder
Knowledge FoundationVINNOVAAvailable from: 2018-08-28 Created: 2018-08-28 Last updated: 2019-01-25Bibliographically approved

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Ghasemi, RohollahJarfors, Anders E.W.

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