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 language | English |
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Title of host publication | Creating a Sustainable Competitive Edge for Magnesium |
Place of Publication | Herning |
Publisher | Normac |
Publication date | 2003 |
Publication status | Published - 2003 |
Event | Normac's 2'nd international magnesium Conference & Exhibition - Technical University of Denmark Duration: 5 Nov 1829 → … |
Conference
Conference | Normac's 2'nd international magnesium Conference & Exhibition |
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City | Technical University of Denmark |
Period | 05/11/1829 → … |