Microstructure of Magnesium alloy AZ91-HP cast in permanent and non-permanent moulds

Niels Tiedje, Rasmus Kirkegaard Sørensen, Sami Albachari

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

    Abstract

    Casting of different geometries were made with AZ91-HP in different moulding media, so that a range of cooling conditions were obtained. Cooling curves were measured and compared to the microstructures found in the castings. It was shown that segregation in the alloy is highly dependent on cooling rate. This leads to precipitation of varying amounts of intermetallic phases. The distribution of phases in the material is controlled both by interdendritic and intergranular segregation, leading to an inhomogeneous microstructure. It is shown that local solidification time, segregation and diffusion in the material interact in a complex manner making segregation and inhomogenity very difficult to avoid.
    Original languageEnglish
    Title of host publicationCreating a Sustainable Competitive Edge for Magnesium
    Place of PublicationHerning
    PublisherNormac
    Publication date2003
    Publication statusPublished - 2003
    EventNormac's 2'nd international magnesium Conference & Exhibition - Technical University of Denmark
    Duration: 5 Nov 1829 → …

    Conference

    ConferenceNormac's 2'nd international magnesium Conference & Exhibition
    CityTechnical University of Denmark
    Period05/11/1829 → …

    Cite this

    Tiedje, N., Sørensen, R. K., & Albachari, S. (2003). Microstructure of Magnesium alloy AZ91-HP cast in permanent and non-permanent moulds. In Creating a Sustainable Competitive Edge for Magnesium Normac. http://www.ipl.dtu.dk/publikation/7361/dk/