Elemental Distribution, Morphological Analysis, and Hardness Measurement of an Al-Si Alloy, as Affected by Cooling Rate
(English)Manuscript (preprint) (Other academic)
The effects of cooling rate on the as-cast microstructure and hardness of an Al - Si alloy was studied. To obtain different cooling rates, a special gradient casting furnace was designed and built. The microstructural analysis was carried out on as-cast samples to investigate the morphology (size, shape, and distribution) of the present phases. By using an analytical scanning electron microscope, the microsegregation of different alloying elements in the centre of aluminium dendrites was investigated. To study the effect of cooling rate on the mechanical properties, hardness of the samples and microhardness of the primary α-Al dendrites were measured. The results showed that the morphology of the silicon eutectic, refinement of the intermetallics, and the size of primary dendrites are cooling rate dependent. Moreover, a clear correlation between the concentration of silicon concentration in the centre of the aluminium dendrites and cooling rate was found.
Elemental distribution, morphological analysis, hardness, Al-Si alloy
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-70097OAI: oai:DiVA.org:liu-70097DiVA: diva2:435495