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Assessment of Mechanisms for Particle Migration in Semi-Solid High Pressure Die Cast Aluminium-Silicon Alloys
KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap, Processer.ORCID-id: 0000-0002-0388-1793
KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap, Processer. (Powder metallurgy)ORCID-id: 0000-0002-6339-4612
Jönköping Universitet.ORCID-id: 0000-0003-2929-7891
KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap, Processer.ORCID-id: 0000-0001-9775-0382
2020 (engelsk)Inngår i: Journal of manufacturing and materials processing, ISSN 1042-6914, Vol. 4, nr 51Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

In semi-solid metal high pressure die casting and in conventional high pressure die casting, it is common to find a defect band just below the surface of the component. The formation of these bands is not fully understood. However, there are several theories as how they occur, and it has been suggested that segregation is caused by the migration of aluminium-rich externally solidified crystals. In the present work the formation of these bands is investigated theoretically by reviewing suitable potential mechanisms for the migration of such crystals. Two mechanisms are identified as the most probable: Saffman lift force and the Mukai-Lin-Laplace effect. However, it was not possible to identify which of these two mechanisms acted in the case studies. Further testing is required to identify the mechanism that is causing the migration of the aluminium globules and suitable tests are proposed.

sted, utgiver, år, opplag, sider
Basel, Switzerland, 2020. Vol. 4, nr 51
Emneord [en]
semi-solid metals; aluminium-silicon alloys; particle migration; high pressure die casting
HSV kategori
Forskningsprogram
Metallurgisk processvetenskap
Identifikatorer
URN: urn:nbn:se:kth:diva-278974DOI: 10.3390/jmmp4020051ISI: 000591330900024Scopus ID: 2-s2.0-85086397904OAI: oai:DiVA.org:kth-278974DiVA, id: diva2:1456934
Merknad

QC 20200819

Tilgjengelig fra: 2020-08-07 Laget: 2020-08-07 Sist oppdatert: 2024-03-15bibliografisk kontrollert

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Hulme-Smith, ChristopherMatsushita, TaishiJönsson, Pär

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