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The Cold Rolling Effect on the Precipitation Sequence and Microstructural Changes of an Al-Mg-Si Alloy

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Abstract:

The rolling operation consists of deforming the material by passing it between two rolls whose spacing is smaller than the initial thickness of the sample, the reduction in thickness is obtained discontinuously by successive passes in the rolling mill whose spacing between the cylinders gradually decreases. This operation can influence on the mechanical and microstructural properties of the deformed materials The effect of cold rolled on microstructural evolution and precipitation sequence in Al-Mg-Si alloy has been investigated by using optical microscopy and Differential Scanning Calorimetry (DSC) in this study. The results revealed that the distribution of the grains are elongated along the rolling direction. We also noted that insoluble coarse particles that originated during the manufacturing process of the alloy have become visible after the rolling processes. The dislocations generated by the plastic deformation during cooled rolling constitute preferential sites for the germination and the growth of the phases, which accelerates the kinetics of the precipitation.

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Periodical:

Defect and Diffusion Forum (Volume 397)

Pages:

51-58

DOI:

https://doi.org/10.4028/www.scientific.net/DDF.397.51

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Online since:

September 2019

Authors:

Hichem Farh*, Toufik Ziar, Hanna Belghit, Mourad Khechba, Abd Elouahab Noua, Fares Serradj

Keywords:

Al-Mg-Si Alloy, Cold Deformation, DSC, Precipitation

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* - Corresponding Author

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