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Surface Defects Structures on Direct Chill Cast 6xxx Aluminium Billets
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences, Engineering and Mathematics.
2011 (English)In: Light Metals 2011, John Wiley & Sons, 2011, 675-680 p.Chapter in book (Other academic)
Abstract [en]

Surface defects found during air-slip direct chill casting are today a major quality factor for extruded aluminum, as they can cause increased segregation, pores and unwanted precipitations. The surface zone in billets of the aluminium alloys 6063, 6005 and 6082 have been analysed by metallographic methods and by chemical analysis. Surface defects, of the type vertical drags, were investigated and compared to defect free surfaces. Inverse segregation to the surface was quantitatively analysed. The concentration profiles were coupled to the appearance of the defects and to microstructures from corresponding areas. It was shown, for vertical drags on 6005 billet surfaces, that either the segregation depth or the precipitated particles were different from surface areas without defects. For the 6063 alloys on the other hand the vertical drag zones contained different particles than surfaces without defects and the segregation had noticeably increased. © 2011 The Minerals, Metals & Materials Society. All rights reserved.

Place, publisher, year, edition, pages
John Wiley & Sons, 2011. 675-680 p.
Keyword [en]
Aluminum, DC casting, Segregation, Surface defects, Vertical drags
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:miun:diva-28893DOI: 10.1002/9781118061992.ch118Scopus ID: 2-s2.0-84886672612OAI: oai:DiVA.org:miun-28893DiVA: diva2:974022
Note

Book Chapter

Available from: 2016-09-23 Created: 2016-09-23 Last updated: 2017-05-03Bibliographically approved

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CiteExportLink to record
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Citation style
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  • nn-NB
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