Study of Dynamic Precipitation during Hot Deformation of Mg-Al-Sn Alloys

Abu Syed Humaun Kabir; Jing Su; In Ho Jung; Stephen Yue

doi:10.4028/www.scientific.net/MSF.765.461

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Study of Dynamic Precipitation during Hot Deformation of Mg-Al-Sn Alloys
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HomeMaterials Science ForumMaterials Science Forum Vol. 765Study of Dynamic Precipitation during Hot...

Study of Dynamic Precipitation during Hot Deformation of Mg-Al-Sn Alloys

Abstract:

The objective of this work is to investigate the effect of dynamic precipitation on the hot deformation behaviour of magnesium. Mg-Al-Sn alloys have been designed using thermodynamic modeling software, FactSage, based on precipitation of Mg₂Sn at hot deformation temperatures. Uniaxial compression has been introduced at the temperature range of 250-350 °C to enhance the formation of precipitates. The flow behaviour and microstructural evolvement were studied for a strain rate of 0.01 /sand deformation degree of 90 %. Dynamic recrystallization (DRX) occurs in this study and it is found that the volume percent of dynamic recrystallization and dynamically recrystallized grain size are related to the amount of precipitation formed during deformation. The formation of Mg₂Sn precipitates during the dynamic recrystallization process may retard the dynamic recrystallization and slow down the grain growth by precipitation pinning effect at the DRX grain boundaries, resulting in a finer grain size.

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Periodical:

Materials Science Forum (Volume 765)

Pages:

461-465

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.765.461

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Online since:

July 2013

Authors:

Abu Syed Humaun Kabir, Jing Su, In Ho Jung, Stephen Yue

Keywords:

Dynamic Recrystallization (DRX), Hot Compression, Precipitation

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