prikaz prve stranice dokumenta The impact of melt retention time on the strontium modification efficiency
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Scientific paper - Original scientific paper
The impact of melt retention time on the strontium modification efficiency
In: CONFERENCE PROCEEDINGS MECHANICAL TECHNOLOGIES AND STRUCTURAL MATERIALS. / Jozić, Sonja; Lela, Branimir; Gjeldum, Nikola (Ed.). Split: Hrvatsko društvo za strojarske tehnologije, 2021. pp. 69-73. urn:nbn:hr:115:110920
Kozina, Franjo; Zovko Brodarac, Zdenka; Tubić Bulat, Barbara

Institutional repository: Repository of Faculty of Metallurgy University of Zagreb

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Kozina, F., Zovko Brodarac, Z. & Tubić Bulat, B. (2021). The impact of melt retention time on the strontium modification efficiency. In S. Jozić, (Ed.), B. Lela, (Ed.), N. Gjeldum, (Ed.), CONFERENCE PROCEEDINGS MECHANICAL TECHNOLOGIES AND STRUCTURAL MATERIALS (pp. 69-73). Split: Hrvatsko društvo za strojarske tehnologije. Retrieved from https://urn.nsk.hr/urn:nbn:hr:115:110920

Kozina, Franjo, et al. "The impact of melt retention time on the strontium modification efficiency." CONFERENCE PROCEEDINGS MECHANICAL TECHNOLOGIES AND STRUCTURAL MATERIALS, edited by Sonja Jozić, edited by Branimir Lela, edited by Nikola Gjeldum, Hrvatsko društvo za strojarske tehnologije, 2021, pp. 69-73. https://urn.nsk.hr/urn:nbn:hr:115:110920

Kozina, Franjo, Zdenka Zovko Brodarac and Barbara Tubić Bulat. "The impact of melt retention time on the strontium modification efficiency." In CONFERENCE PROCEEDINGS MECHANICAL TECHNOLOGIES AND STRUCTURAL MATERIALS, 69-73. Split: Hrvatsko društvo za strojarske tehnologije, 2021. Accessed 2024 November 30. https://urn.nsk.hr/urn:nbn:hr:115:110920

Kozina, F., Zovko Brodarac, Z. and Tubić Bulat, B. (2021) 'The impact of melt retention time on the strontium modification efficiency', in Jozić, S. (ed.), Lela, B. (ed.), Gjeldum, N. (ed.), CONFERENCE PROCEEDINGS MECHANICAL TECHNOLOGIES AND STRUCTURAL MATERIALS, Hrvatsko društvo za strojarske tehnologije, Split, pp. 69-73. Available at: https://urn.nsk.hr/urn:nbn:hr:115:110920 (Accessed 30 November 2024)

Kozina F, Zovko Brodarac Z, Tubić Bulat B. The impact of melt retention time on the strontium modification efficiency. In: S. Jozić, ed., B. Lela, ed., N. Gjeldum, ed. CONFERENCE PROCEEDINGS MECHANICAL TECHNOLOGIES AND STRUCTURAL MATERIALS. Split: Hrvatsko društvo za strojarske tehnologije; 2021. Pp. 69-73. [cited 2024 November 30] Available at: https://urn.nsk.hr/urn:nbn:hr:115:110920

F. Kozina, Z. Zovko Brodarac and B. Tubić Bulat, "The impact of melt retention time on the strontium modification efficiency", CONFERENCE PROCEEDINGS MECHANICAL TECHNOLOGIES AND STRUCTURAL MATERIALS, S. Jozić, B. Lela and N. Gjeldum, Eds. Split: Hrvatsko društvo za strojarske tehnologije, 2021. [Online] Available at: https://urn.nsk.hr/urn:nbn:hr:115:110920 [Accessed: 30 November 2024]

Metadata
Title (english)The impact of melt retention time on the strontium modification efficiency
AuthorFranjo Kozina
AuthorZdenka Zovko Brodarac
AuthorBarbara Tubić Bulat
EditorSonja Jozić
EditorBranimir Lela
EditorNikola Gjeldum
Author's institutionUniversity of Zagreb
Faculty of Metallurgy
(Department of Process Metallurgy)
(Laboratory of Iron, Steel and Founding)
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Metallurgy
Process Metallurgy
Abstract (english)
The modification of eutectic (αAl+βSi) phase is frequently performed during processing of aluminum-silicone (Al-Si) based foundry alloys leading to a structural transformation of the eutectic βSi phase from a course plate to a fine fibrous morphology. The morphological refinement of the brittle eutectic βSi phase improves ductility, tensile strength, and elongation. This research was performed to estimate the influence of melt retention time on strontium (Sr) modification efficiency. For this purpose, the AlSi12 alloy with eutectic composition was produced and processed by the addition of AlSr10 master alloy. The samples for chemical, mechanical and microstructure analysis were taken with melt retention time of 20 min, 40 min and 80 min. The results of chemical composition analysis indicated the decrease in Sr content with the increase in melt retention time. The poor Sr recovery was a result of the subsequent addition of chemical degassing agents led to the gas entrapment in the melt. Consequently, the highest gas index and most severe porosities were found in sample with retention time of 20 min. The fully modified eutectic (αAl+βSi) phase morphology was only obtained in sample with retention time of 20 min. After melt retention time of 40 min the unmodified plate-like eutectic βSi phase particles were found. Additional prolongation of melt retention time to 80 min led to the coarsening of eutectic βSi phase particle. The plate-like eutectic βSi phase particles were located near the primary αAl dendritic network and surrounding the primary βSi phase particles. This phase distribution suggests that the transformation of the primary αAl dendritic network is followed by solidification of unmodified eutectic βSi phase particles.
Keywords (english)
Languageenglish
Publication typeScientific paper - Original scientific paper
Publication statusPublished
Peer reviewPeer review - international
Publication versionPublished version
Publication titleCONFERENCE PROCEEDINGS MECHANICAL TECHNOLOGIES AND STRUCTURAL MATERIALS
Numberingpp. 69-73
p-ISSN1847-7917
URN:NBNurn:nbn:hr:115:110920
Publication2021
ConferenceTitle: 10 International Conference Mechanical Technologies and Structural Materials 2021
Acronym: MTSM 2021
Location: Split, Croatia
Organizer: Hrvatsko društvo za strojarske tehnologije
Start date: 2021-09-09
End date: 2021-09-24
Assembly type: Lecture
Document URLhttp://www.strojarska-tehnologija.hr/#mtsm
Type of resourceText
PublisherHrvatsko društvo za strojarske tehnologije
Publishing placeSplit
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2021-10-01 07:55:49