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The role of Sr on microstructure formations and mechanical properties of  Al-Si-Cu-Mg casting alloy
Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting.ORCID iD: 0000-0002-1190-836X
Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting.
2013 (English)Conference paper, Oral presentation only (Refereed)
Abstract [en]

The aim of the paper is to assess the role of Sr modification on eutectic Si, Fe-rich intermetallics and porosity and their responses to the mechanical properties of a commercial high pressure die cast alloy Al-Si-Cu-Mg with Fe level up to 1%. Tensile test samples with a variety of coarsenesses, containing different Sr levels were cast using the gradient solidification technique, that enables a study of the solely influence of Sr on microstructure and tensile properties. The modification altered the morphology and size of eutectic silicon, as well as the characteristics and distribution of Fe-rich intermetallic and porosity. The tensile test results indicate that eutectic Si modification is not a guarantee for improved mechanical properties due to the presence of a variety of Fe-intermetallics and porosity that tend to have a larger role on initiating and propagating cracks leading to premature failures in these commercial alloys.

Place, publisher, year, edition, pages
2013.
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:hj:diva-20208OAI: oai:DiVA.org:hj-20208DiVA: diva2:584564
Conference
TMS 2013, 142nd Annual Meeting & Exhibition, March 3-7, 2013: San Antonio, TX, USA
Funder
Knowledge Foundation
Available from: 2013-01-09 Created: 2013-01-09 Last updated: 2015-05-21Bibliographically approved

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Zamani, MohammadrezaSeifeddine, Salem
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