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Local chill as a mean of increasing strength in grey cast iron
ScaniaCV AB, Engine Development, Södertälje, Sweden.
Jönköping University, School of Engineering, JTH, Materials and Manufacturing. Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting.
Scania CV AB, Materials Technology, Södertälje, Sweden.
Scania CV AB, Materials Technology, Södertälje, Sweden.
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2016 (English)In: International Journal of Cast Metals Research, ISSN 1364-0461, E-ISSN 1743-1336, Vol. 29, no 1-2, 40-46 p.Article in journal (Refereed) Published
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Text
Abstract [en]

The influence of a chill on the mechanical properties and microstructural features in grey cast iron has been studied. Some of the main findings were that the chill refined the microstructure and modified the graphite distribution from A to D/E. Eutectic cell size was reduced by 60–70%. The Brinell hardness increased while the Vickers hardness, measured in dendrite arms, was unaffected. Fatigue testing in four point bending showed that the fatigue limit was increased by 20–30% in the chilled samples. An increase in tensile strength, proof strength and Young’s modulus was also observed in the chilled samples. The increase in fatigue limit was approximately twice as high as the increase in tensile strength. A possible explanation could be that the eutectic cell size had a more pronounced effect on the fatigue limit than on the tensile strength.

Place, publisher, year, edition, pages
2016. Vol. 29, no 1-2, 40-46 p.
Keyword [en]
Chill, Eutectic cell size, Fatigue limit, Grey cast iron, Mechanical properties, Biomechanics, Cast iron, Chilling, Eutectics, Fatigue testing, Iron, Microstructural evolution, Vickers hardness, Brinell hardness, Dendrite arms, Eutectic cells, Four point bending, Microstructural features, Tensile strength
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:hj:diva-31231DOI: 10.1080/13640461.2016.1142235ISI: 000377468800007ScopusID: 2-s2.0-84978419635OAI: oai:DiVA.org:hj-31231DiVA: diva2:952089
Available from: 2016-08-11 Created: 2016-08-11 Last updated: 2016-08-11Bibliographically approved

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Svensson, Ingvar L.
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JTH, Materials and ManufacturingJTH. Research area Materials and manufacturing – Casting
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