Change search
ReferencesLink to record
Permanent link

Direct link
Determination of the columnar to equiaxed transition in hypoeutectic lamellar cast iron
Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting. (Foundry Technology)ORCID iD: 0000-0001-7012-9342
Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting. (Foundry Technology)
2014 (English)In: ISIJ International, ISSN 0915-1559, E-ISSN 1347-5460, Vol. 54, no 2, 460-465 p.Article in journal (Refereed) Published
Abstract [en]

Shrinkage porosity as a volume change related casting defect in lamellar cast iron was reported in theliterature to form during solidification in connection to the dendrite coherency. The present work includesan experimental study on dendrite coherency – also called columnar-to-equiaxed transition in lamellar castiron using thermal analysis and expansion force measurements. Investigation was carried out in order tostudy the mechanism of dendrite coherency formation. Cylindrical test bars were cast from the same alloywith different pouring temperature, amount of inoculant and time between the addition of inoculant andstart of pouring the samples. Cooling rate and expansion force was recorded as a function of time. Anumerical algorithm based on temperature differences measured under solidification was used to inter-pret the solidification process. Three different methods have been compared to determine the columnarto equiaxed transition. The compared methods were based on registered temperature differences, basedon registered expansion forces during the volume change of the solidifying samples and based on the cal-culated released latent heat of crystallization. The obtained results indicate a considerable influence on theformation and progress of coherency due to variation of casting parameters. It has been shown that thecoherency is not a single event at a defined time moment rather a process progressing during a timeinterval.

Place, publisher, year, edition, pages
2014. Vol. 54, no 2, 460-465 p.
Keyword [en]
columnar to equiaxed transition; dendrite coherency; lamellar cast iron; inoculation
National Category
Metallurgy and Metallic Materials
URN: urn:nbn:se:hj:diva-25444DOI: 10.2355/isijinternational.54.460OAI: diva2:774939
Available from: 2014-12-30 Created: 2014-12-30 Last updated: 2015-10-26Bibliographically approved

Open Access in DiVA

fulltext(600 kB)181 downloads
File information
File name FULLTEXT03.pdfFile size 600 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Other links

Publisher's full text

Search in DiVA

By author/editor
Svidró, PeterDiószegi, Attila
By organisation
JTH. Research area Materials and manufacturing – Casting
In the same journal
ISIJ International
Metallurgy and Metallic Materials

Search outside of DiVA

GoogleGoogle Scholar
Total: 182 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 347 hits
ReferencesLink to record
Permanent link

Direct link