Microstructural study of AZ91C magnesium alloy castings produced by investment casting in as-cast state and after heat treatment

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dc.contributor.authorDyčka, Martincs
dc.contributor.authorDyčková, Luciecs
dc.contributor.authorGejdoš, Pavelcs
dc.contributor.authorJuliš, Martincs
dc.date.accessioned2020-03-05T11:54:24Z
dc.date.available2020-03-05T11:54:24Z
dc.date.issued2019-05-24cs
dc.description.abstractIn this article, the microstructure of AZ91C magnesium alloy castings produced by investment casting was investigated. Castings were studied in as-cast state and after T4 and T6 heat treatment. The identification of all phases in microstructure was carried out using a scanning electron microscope (SEM) with energy dispersive X-ray spectroscopy (EDS) analysis. The influence of cooling rate after casting, temperature of solution annealing, temperature of artificial aging and cooling rate after heat treatment on the microstructural characteristics such as secondary dendrite arm spacing (SDAS) or grain size was studied. The SDAS analyses were carried out using a light microscopy with the subsequent image analysis. Except of Mg-Al solid solution and Mg17Al12 precipitates, the microstructure contains other phases based on Mg-Si and (Al,Si)-Mn in globular or needle morphology. The SDAS in as-cast state was measured and was of tens of micrometers, but after T4 heat treatment, the gran size exceeded 100 µm and the Mg17Al12 phase was still undissolved along the grain boundaries in samples with thicker wall dimension. After T6 heat treatment, continuous and discontinuous precipitates of Mg17Al12 phase were formed, most of them were nearby the grain boundaries proving the inhomogeneous distribution of Al atoms in solid solution after T4 heat treatment.en
dc.formattextcs
dc.format.extent1457-1462cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationMetal 2019. 2019, p. 1457-1462.en
dc.identifier.isbn978-80-87294-92-5cs
dc.identifier.other162552cs
dc.identifier.urihttp://hdl.handle.net/11012/184692
dc.language.isoencs
dc.publisherTanger Ltd.cs
dc.relation.ispartofMetal 2019cs
dc.relation.urihttps://metal2019.tanger.cz/files/uploads/02//METAL2019_Conference_Proceedings_Content.pdfcs
dc.rights(C) Tanger Ltd.cs
dc.rights.accessopenAccesscs
dc.subjectAZ91en
dc.subjectheat treatmenten
dc.subjectinvestment castingen
dc.subjectmagnesium alloyen
dc.subjectmicrostructureen
dc.titleMicrostructural study of AZ91C magnesium alloy castings produced by investment casting in as-cast state and after heat treatmenten
dc.type.driverconferenceObjecten
dc.type.statusPeer-revieweden
dc.type.versionacceptedVersionen
sync.item.dbidVAV-162552en
sync.item.dbtypeVAVen
sync.item.insts2020.10.29 11:05:48en
sync.item.modts2020.10.27 16:15:17en
thesis.grantorVysoké učení technické v Brně. Středoevropský technologický institut VUT. Charakterizace materiálů a pokročilé povlaky 1-06cs
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