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In-situ EBSD study of deformation behavior of Al-Si-Cu alloys during tensile testing
Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting.
Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting.ORCID iD: 0000-0001-6481-5530
Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting.ORCID iD: 0000-0002-0101-0062
2015 (English)In: Materials & design, ISSN 0264-1275, E-ISSN 1873-4197, Vol. 84, 36-47 p.Article in journal (Refereed) Published
Abstract [en]

This study deals with the microstructural aspects of the deformation behavior in Al-Si-Cu alloy A380. This has been carried out with in-situ tensile testing coupled with EBSD analysis. The alloy specimens having different microstructures with two different secondary dendrite arm spacing (SDAS) of 9 µm and 27 µm were produced by the unique gradient solidification method. The study of misorientation distribution and texture evolution was performed with different tools in EBSD analysis. The texture was not significantly affected by deformation in both types of alloy specimens. With increase in the deformation, the microstructures are characterized by degradation of EBSD patterns and generation of substructures including low angle boundaries (LABs) and high angle boundaries (HABs). In both the microstructures with low and high SDAS, the boundaries were concentrated around eutectic phases; however this behavior was more pronounced at higher SDAS. The increase in the fraction of LABs with deformation was much higher in the microstructure with higher SDAS than with lower SDAS. This localized strain concentration was especially attributed to the large and elongated eutectic Si particles and Fe-rich intermetallics. The lower mechanical properties obtained at higher SDAS are the result of inhomogeneous strain distribution in the microstructure.

Place, publisher, year, edition, pages
Elsevier, 2015. Vol. 84, 36-47 p.
Keyword [en]
Aluminium, Al alloys, as-cast alloys, EBSD, in-situ tensile tests, deformation
National Category
Engineering and Technology Materials Engineering
Identifiers
URN: urn:nbn:se:hj:diva-27144DOI: 10.1016/j.matdes.2015.06.100ISI: 000361147600005Scopus ID: 2-s2.0-84941286595OAI: oai:DiVA.org:hj-27144DiVA: diva2:820424
Available from: 2015-06-12 Created: 2015-06-12 Last updated: 2017-01-04Bibliographically approved

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Borkar, HemantSeifeddine, SalemJarfors, Anders
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