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2016 | OriginalPaper | Chapter

Microstructural and mechanical evolutions during the forging step of the COBAPRESS, a casting/forging process

Authors : Frédéric Perrier, Christophe Desrayaud, Véronique Bouvier

Published in: ICAA13 Pittsburgh

Publisher: Springer International Publishing

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Aluminum casting/forging processes are used to produce parts for the automotive industry. In this study, we examined the influence of the forging step on the microstructure and the mechanical properties of an A356 aluminum alloy modified with strontium. Firstly, a design of samples which allows us to test mechanically the alloy before and after forging was created. A finite element analysis with the ABAQUS software predicts a maximum of strain in the core of the specimens. Observations with the EBSD technique confirm a more intense sub-structuration of the dendrite cells in this zone. Yield strength, ultimate tensile strength, elongation and fatigue lives were then improved for the casting/forging samples compared to the only cast specimens. The closure of the porosities and the improvement of the surface quality during the forging step enhance also the fatigue resistance of the samples.

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Metadata
Title
Microstructural and mechanical evolutions during the forging step of the COBAPRESS, a casting/forging process
Authors
Frédéric Perrier
Christophe Desrayaud
Véronique Bouvier
Copyright Year
2016
Publisher
Springer International Publishing
DOI
https://doi.org/10.1007/978-3-319-48761-8_253

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