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Erschienen in:
2016 | OriginalPaper | Buchkapitel
An Isothermal Calorimetry Technique for Measurement of C-Curves in AA6XXX Alloys
verfasst von : Leo Colley, Nitin Singh, Cyrille Bezençon
Erschienen in: ICAA13 Pittsburgh
Verlag: Springer International Publishing
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Quantitative description of precipitation processes is of importance for alloy development and process optimization in AA6xxx alloys. An isothermal calorimetry technique was used to measure the exothermic heat evolution of an AA6xxx alloy during artificial ageing following various interrupted quench experiments in the temperature range 300–450°C. Subsequently, the total heat measured in the calorimeter was used to estimate the amount of solute present in the alloy at room temperature following quenching and to construct c-curves for precipitation during the hold time of the interrupted quench. The microstructure predictions made using the c-curves compared well with resistivity and microhardness measurements in the peak-aged condition.