DSC study of precipitation in an Al–Mg–Mn alloy microalloyed with Cu
DSC study of precipitation in an Al–Mg–Mn alloy microalloyed with Cu
Power compensation differential scanning calorimetry (DSC) has been employed to detect and analyse precipitation reactions in an Al–1.3Mg–0.4Mn and an Al–1.3Mg–0.4Mn–0.07Cu alloy in which very small amounts of precipitate, less than 0.3 at.%, are expected to form. Due to the very small heat effects, baseline instability and drift significantly interfere with the measurements. After repeated experiments and careful baseline correction it is demonstrated that in the Cu containing alloy, ageing at 170 °C causes the appearance of two endothermic effects: for 2 days ageing a small dissolution effect appears at about 230 °C, whilst for 7 and 21 days ageing a dissolution effect peaking appears at about 300 °C. The temperature range of the latter is consistent with S phase dissolution.
dsc, thermal analysis, precipitation, 3xxx alloy, s phase
5-11
Starink, M.J.
fe61a323-4e0c-49c7-91f0-4450e1ec1e51
Dion, A.
429d6099-dfc4-441c-b7e3-5cda85cf060a
2004
Starink, M.J.
fe61a323-4e0c-49c7-91f0-4450e1ec1e51
Dion, A.
429d6099-dfc4-441c-b7e3-5cda85cf060a
Starink, M.J. and Dion, A.
(2004)
DSC study of precipitation in an Al–Mg–Mn alloy microalloyed with Cu.
Thermochimica Acta, 417 (1), .
(doi:10.1016/j.tca.2004.01.013).
Abstract
Power compensation differential scanning calorimetry (DSC) has been employed to detect and analyse precipitation reactions in an Al–1.3Mg–0.4Mn and an Al–1.3Mg–0.4Mn–0.07Cu alloy in which very small amounts of precipitate, less than 0.3 at.%, are expected to form. Due to the very small heat effects, baseline instability and drift significantly interfere with the measurements. After repeated experiments and careful baseline correction it is demonstrated that in the Cu containing alloy, ageing at 170 °C causes the appearance of two endothermic effects: for 2 days ageing a small dissolution effect appears at about 230 °C, whilst for 7 and 21 days ageing a dissolution effect peaking appears at about 300 °C. The temperature range of the latter is consistent with S phase dissolution.
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DSC_of_Al-Mg-Mn_with_Cu_by_Starink_and_Dion.pdf
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Published date: 2004
Keywords:
dsc, thermal analysis, precipitation, 3xxx alloy, s phase
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Local EPrints ID: 22749
URI: http://eprints.soton.ac.uk/id/eprint/22749
ISSN: 0040-6031
PURE UUID: a0f15656-45e4-47c2-9ad9-daa821aa2d80
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Date deposited: 23 Mar 2006
Last modified: 15 Mar 2024 06:40
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Author:
A. Dion
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