Thermal analysis as a microstructure prediction tool for A356 aluminium parts solidified under various cooling conditions
Year: 2010
Type: article
Abstract: Thermal analysis technique has been used for a long time, in both ferrous and nonferrous industries for evaluating the metallurgical quality of the liquid metal before casting. However, obtaining a proper microstructure in a standard cup does not ensure that the microstructure is correct in real parts which may solidify at very differentcooling rates. For this study, alloy A356 with different metal quality in terms of modification and grain refinementwas tested. Different cooling rates were obtained by using cylindrical test samples with various diameters cast insand and metallic moulds. The correlation between microstructure features such as grain size, modification rate and secondary dendrite arm spacing (SDAS) measured in the standard thermal analysis cup with those obtained in the cylindrical test parts has been investigated. Thus, knowing the thermal modulus and the mould type it ispossible to establish the required grain size and modification rate in the standard cup in order to get a desired structure in a real part. Corrective actions can then be taken in order to improve the metallurgical quality before casting the part.
Source: HAL
Authors: Niklas, Abaunza, Fernandez-Calvo, Lacaze, Suárez
Language: English
Subfield: Metals and Alloys
Field: Materials Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W60044456