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The Effect of Strontium on the Strength of Layers of Double Oxide Film Defects
Shahid Bahonar Univ Kerman, Sch Engn, Dept Met & Mat Sci, Jomhoori Eslami Blvd, Kerman, Iran..
Shahid Bahonar Univ Kerman, Sch Engn, Dept Met & Mat Sci, Mat Sci, Jomhoori Eslami Blvd, Kerman, Iran..ORCID-id: 0000-0001-9943-106X
Shahid Bahonar Univ Kerman, Sch Engn, Dept Met & Mat Sci, Jomhoori Eslami Blvd, Kerman, Iran..ORCID-id: 0000-0003-1779-8728
2016 (Engelska)Ingår i: Metallurgical and Materials Transactions. A, ISSN 1073-5623, E-ISSN 1543-1940, Vol. 47A, nr 3, s. 1331-1338Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The change in the strength of layers of oxide film (bifilm) defects when held in Al-0.05 and 0.1 wt pct melts was evaluated indirectly by comparing the porosity, average pore roundness, and pore number density results obtained from a reduced pressure test of the commercial purity and Sr-containing Al melts subjected to different holding and vibration regimes. Any changes in the composition of the pores were also studied using scanning electron microscopy and energy-dispersive X-ray spectroscopy. The results showed that the Al2O3 layers of a newly formed oxide film defect, when held in Al-0.05 or 0.1 wt pct Sr melt, transformed gradually into an Sr-containing oxide. This transformation caused the strength of the oxide layers to increase and the rate of the expansion of its atmosphere and removal of the defect from the melt to decrease. This might influence the increase in the porosity of Sr-modified Al castings.

Ort, förlag, år, upplaga, sidor
Springer, 2016. Vol. 47A, nr 3, s. 1331-1338
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Materialteknik
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URN: urn:nbn:se:kth:diva-263988DOI: 10.1007/s11661-015-3302-9ISI: 000371308200032Scopus ID: 2-s2.0-84957427998OAI: oai:DiVA.org:kth-263988DiVA, id: diva2:1371593
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QC 20191120

Tillgänglig från: 2019-11-20 Skapad: 2019-11-20 Senast uppdaterad: 2019-11-20Bibliografiskt granskad

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Raiszadeh, RaminDoostmohammadi, Hamid
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