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Development of aluminium-silicon alloys with improved properties at elevated temperature
Jönköping University, School of Engineering, JTH, Materials and Manufacturing.
2017 (English)Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

Aluminium-silicon alloys have gained increasing market share in the automotive and aerospace industry because of increased environmental demands. These alloys have a high strength-to-weight ratio, good corrosion resistance, castability and recycling potential. However, variations in properties and limited performance at elevated temperature are restricting these alloys from use at elevated temperatures. During the last decades, researchers have investigated ways to improve the properties at elevated temperatures. However, the effect of some transition elements is not well understood. The aim of this work is to investigate the aluminium-silicon alloys with addition of cobalt and nickel for high temperature applications. Tensile testing and hardness testing were conducted on samples produced by directional solidification in a Bridgman furnace with condition generating a microstructure corresponding to that obtained in high pressure die casting, i.e. SDAS ~ 10 µm. The results show that cobalt and nickel improve the tensile properties up to 230 °C.

Place, publisher, year, edition, pages
2017. , p. 37
Keyword [en]
Al-Si alloy, Nickel, Cobalt, Elevated temperature properties, Microstructure
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:hj:diva-37499ISRN: JU-JTH-PRU-2-20170080OAI: oai:DiVA.org:hj-37499DiVA, id: diva2:1146050
External cooperation
Swerea swecast
Presentation
2017-09-29, E4303, 08:47 (English)
Supervisors
Examiners
Available from: 2017-10-04 Created: 2017-10-02 Last updated: 2017-10-04Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • ieee
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  • vancouver
  • Other style
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Output format
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