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Influence of Solidification on the Primary Austenite Structure of Grey Cast Iron
Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting.
Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Materials and Manufacturing - Casting.
2008 (English)Report (Other academic)
Abstract [en]

In this work, the influence of cooling rate, chemical composition and inoculation practice on the solidification of grey cast iron has been examined. The primary solidification structure, referred to as the macrostructure, was preserved using a special heat treatment, DAAS (Direct Austempering After Solidification). These samples were etched and the number of equiaxed and columnar crystals as well as the transition between these areas, CET, was examined quantitatively. Samples considered As-Cast were colour etched to reveal the microstructural constituents. On these samples the number of eutectic cells, fraction of primary austenite and DAS (Dendrite Arm Spacing) was investigated. The relationship between CET and the number of equiaxed crystals was confirmed, and decreases with increasing number of equiaxed crystals per unit volume. It was also found that the number of equiaxed chemical composition. Furthermore, there is a relationship between eutectic cells and DAS; where the eutectic cell size increases with increasing DAS. DAS, on the other hand, depends on inverse cooling rate and the number of equiaxed crystals.

Place, publisher, year, edition, pages
Jönköping: Tekniska Högskolan , 2008. , 12 p.
Series
Research Report. School of Engineering, ISSN 1404-0018 ; 2008:1
Keyword [en]
Grey iron, Solidification, Primary austenite, Equiaxed crystals, Columnar crystals, CET, Eutectic cells, DAS
Identifiers
URN: urn:nbn:se:hj:diva-1187OAI: oai:DiVA.org:hj-1187DiVA: diva2:3629
Available from: 2008-03-01 Created: 2008-03-01 Last updated: 2011-09-29Bibliographically approved

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CiteExportLink to record
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Citation style
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