Experimental and mathematical procedure for characterization of the thermal profile in a quasi-unidirectional solidification aluminum alloy AA354 casting

• Type: Summary of Presentation in an International Conference
• Date: 2011

Authors

Bruno Fragoso (Author) FEUP; H. Santos (Author) FEUP

Conference proceedings International

Title: VI International Materials Symposium MATERIAIS 2011

VI International Materials Symposium MATERIAIS 2011

Scientific classification

FOS: Engineering and technology > Materials engineering

CORDIS: Technological sciences > Engineering > Materials engineering

Other information

Abstract (EN): In this work the authors show how to build a semi-industrial scale macro-thermal analysis experimental apparatus for low pressure aluminum casting AA354 with quasi-unidirectional solidification. Several thermocouples were connected to a multichannel electronic device allowing a sampling rate up to 10 Hz; the thermocouples were installed in the mould at different locations to acquire the discontinuous cooling curves at those same locations. With this type of experiment and appropriate mathematical procedures it was possible to build a reasonable response surface and the respective derivatives: T=f(x,t) and the respective derivatives. Exponential polynomials were applied for modeling the curves and linear interpolation to relate the several cooling curves. Mathematical tools applied to the modeled curves allowed the authors to identify different solidification events and correlate them with the specific thermal gradient and cooling conditions.

Language: English

Type (Professor's evaluation): Scientific