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Microstructure analysis of Al-Si-Cu alloys prepared by gradient solidification technique
Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Material och tillverkning – Gjutning.
Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Material och tillverkning – Gjutning.ORCID-id: 0000-0001-6481-5530
Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Material och tillverkning – Gjutning.ORCID-id: 0000-0002-0101-0062
2015 (engelsk)Inngår i: International Journal of Modern Physics B, ISSN 0217-9792, Vol. 29, nr 10-11, artikkel-id 1540015Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Al–Si–Cu alloys were cast with the unique gradient solidification technique to producealloys with two cooling rates corresponding to secondary dendrite arm spacing (SDAS) of ∼9 and ∼27 μm covering the microstructural fineness of common die cast components.The microstructure was studied with optical microscopy and scanning electronmicroscopy (SEM) equipped with energy dispersive spectroscopy (EDS) and electronbackscattered diffraction (EBSD). The alloy with higher cooling rate, lower SDAS, hasa more homogeneous microstructure with well distributed network of eutectic and intermetallicphases. The results indicate the presence of Al–Fe–Si phases, Al–Cu phases andeutectic Si particles but their type, distribution and amount varies in the two alloys withdifferent SDAS. EBSD analysis was also performed to study the crystallographic orientationrelationships in the microstructure. One of the major highlights of this study is theunderstanding of the eutectic formation mechanism achieved by studying the orientationrelationships of the aluminum in the eutectic to the surrounding primary aluminumdendrites.

sted, utgiver, år, opplag, sider
2015. Vol. 29, nr 10-11, artikkel-id 1540015
Emneord [en]
aluminium, casting, gradient solidification, microstructure, EBSD
HSV kategori
Identifikatorer
URN: urn:nbn:se:hj:diva-24688DOI: 10.1142/S0217979215400159ISI: 000353523600016Scopus ID: 2-s2.0-84928521654OAI: oai:DiVA.org:hj-24688DiVA, id: diva2:745084
Tilgjengelig fra: 2014-09-09 Laget: 2014-09-09 Sist oppdatert: 2017-12-05bibliografisk kontrollert

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