The knowledge of viscosity of alloys is a key-point for understanding and modelling their behaviour in foundry processes. The lack of experimental data, due to the difficulty in carrying out viscosity tests for metals and alloys, suggests the use of technological tests, such as the measurement of fluidity length. This paper presents the development of a device for the evaluation of fluidity length of casting alloys, and its application to commercially pure (cp) Aluminium and to some Al-Si alloys. The experimental data, obtained in temperature intervals ranging from liquidus to about 800°C, show a good agreement with the behaviour described in literature. Their elaboration, carried out according to an Arrhenius-type approach, allows an estimation of the viscosity of the alloys investigated.
Evaluation of fluidity in Aluminium alloys
BONOLLO, FRANCO;
2001
Abstract
The knowledge of viscosity of alloys is a key-point for understanding and modelling their behaviour in foundry processes. The lack of experimental data, due to the difficulty in carrying out viscosity tests for metals and alloys, suggests the use of technological tests, such as the measurement of fluidity length. This paper presents the development of a device for the evaluation of fluidity length of casting alloys, and its application to commercially pure (cp) Aluminium and to some Al-Si alloys. The experimental data, obtained in temperature intervals ranging from liquidus to about 800°C, show a good agreement with the behaviour described in literature. Their elaboration, carried out according to an Arrhenius-type approach, allows an estimation of the viscosity of the alloys investigated.
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