Thermographic analysis of AlSi12 during crystallisation as a function of cooling rate

At the Institute of Materials Science of the Leibniz University of Hannover, investigations were carried out to better understand the crystallisation processes of the cast alloy AlSi12. Here, the influence of different cooling rates was investigated in-situ and ex-situ. The temperatures of the geometric specimens were determined during the experiment with the aid of a near-infrared camera and thermocouples. The aim was to both determine a function between the specimen' cooling rate and the speed of the solid – liquid interface as well as establish a relationship between the thermographic images and the solidification' morphology.