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Defect formation mechanisms in lamellar graphite iron related to the casting geometry
Jönköping University, School of Engineering, JTH, Materials and Manufacturing. Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting.ORCID iD: 0000-0002-3024-9005
Jönköping University, School of Engineering, JTH, Materials and Manufacturing. Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting.ORCID iD: 0000-0001-7012-9342
SinterCast AB, Technical Centre, Katrineholm, Sweden.
Faculty of Technology, Department of Mechanical Engineering, Linnaeus University, Växjö, Sweden.
2016 (English)In: International Journal of Cast Metals Research, ISSN 1364-0461, E-ISSN 1743-1336, Vol. 29, no 5, 279-285 p.Article in journal (Refereed) Published
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Abstract [en]

Although lamellar cast iron has been used in advanced applications for about 20 years, our knowledge about the mechanisms affecting microstructure and defect formation is relatively limited. The present paper summarises some solidification-related phenomena from a series of recently published peer-reviewed papers and scientific theses and suggests a mechanism of defect formation which is dependent on the shape of the solidifying casting geometry. When shrinkage porosity or metal expansion penetration occurs, evidence of material transport in the intergranular zone of primary equiaxed austenite grains in the casting and in the intergranular regions between the sand grains in the mould material is seen. Material transport occurs across the casting-mould interface, where the existence of or the permeability of the primary columnar zone determines if material transport can take place.

Place, publisher, year, edition, pages
Taylor & Francis, 2016. Vol. 29, no 5, 279-285 p.
Keyword [en]
Columnar to equiaxed transition, Columnar zone, Defect formation mechanisms, Equiaxed zone, Lamellar graphite iron, Metal expantion penetrayion, Primary austenite grains, Shrinkage porosity, Austenite, Cast iron, Graphite, Interfaces (materials), Iron, Molds, Porosity, Shrinkage, Textures, Defect formation, Graphite iron, Primary austenite, Defects
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:hj:diva-31287DOI: 10.1080/13640461.2016.1211579ISI: 000386206200006Scopus ID: 2-s2.0-84980349450OAI: oai:DiVA.org:hj-31287DiVA: diva2:953891
Available from: 2016-08-19 Created: 2016-08-19 Last updated: 2017-01-04Bibliographically approved

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