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Influence of predeformation on microstructure evolution of superplastically formed Al 5083 alloy


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Chentouf, S. M., Belhadj, T., Bombardier, N., Brodusch, N., Gauvin, R. et Jahazi, M.. 2017. « Influence of predeformation on microstructure evolution of superplastically formed Al 5083 alloy ». International Journal of Advanced Manufacturing Technology, vol. 88, nº 9. pp. 2929-2937.
Compte des citations dans Scopus : 8.

Jahazi M 2016 12871 Influence of predeformation on microstructure.pdf - Accepted Version
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Cavitation is the main defect encountered during superplastic forming (SPF) of thin sheet aluminum alloys. In the present paper, the influence of preforming operation (cold or hot) on the superplastic forming ability and quality of 1.6-mm-thick sheet of 5083 SPF aluminum alloy is investigated. Specifically, grain size evolution and the characteristics of the cavitation process are discussed as a function of prior deformation and the preforming temperature. Optical and field emission gun scanning electron microscopy (FEG-SEM) were used to study the characteristics of the cavities and microstructure evolution. Image processing was used to measure the surface and volume fractions of the cavities. The results indicate that hot preforming leads to a lower number of cavities per unit surface compared to cold preforming prior to the SPF operation. However, the average cavity sizes and the average grain size are higher in the case of hot preforming compared to cold preforming, which lead to higher susceptibility to crack formation and reduced SPF ability of the alloy.

Item Type: Peer reviewed article published in a journal
Jahazi, Mohammad
Affiliation: Génie mécanique
Date Deposited: 28 Jun 2016 20:25
Last Modified: 01 Aug 2018 13:58

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