Warm Hydroforming of Lightweight Metal Sheets

Journal Article · Thu May 17 04:00:00 EDT 2007 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2740969· OSTI ID:21057344

Aginagalde, A; Orus, A; Esnaola, J A; Torca, I; Galdos, L; Garcia, C ^[1]

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1. Mondragon Goi Eskola Politeknikoa (MGEP), Manufacturing Department, Loramendi 4, 20500, Mondragon (Spain)

Hydroforming is well known in steel applications for automotive industry, where complicated shapes can be get with high strength to weight ratios. Nevertheless, the poor formability of light alloys at room temperature has limited the application of hydroforming technology for aluminum and magnesium parts. Increasing the temperature of these materials allows substantially greater elongation without fracture. Warm forming strategy is applied in conventional processes, such as rolling and forging, in order to get complex shapes, but still rare in hydroforming technology. This is the technical base of this research project: the development of the hydroforming process at warm working temperatures. The main tasks of the initial phases of the research were the material characterization, and the heated fluid and tooling system design and set up for warm hydroforming of lightweight alloys. Once these goals were accomplished the present paper shows the obtained results. The uniaxial tensile deformation of 5754H111, 6082-T6, 6082-O and AZ31B at the temperature range of 25 deg. C - 250 deg. C is presented as the output of the material characterization task. Both the system features and the results obtained for a bulge test geometry carried out with a warm hydroforming system are also presented. The selected alloys show an improvement in formability at the studied temperature range under both uniaxial and biaxial state of stress.

• OSTI ID: 21057344
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 908; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM
ALUMINIUM ALLOYS
DESIGN
FLUIDS
FORGING
FRACTURES
HOT WORKING
MAGNESIUM
MAGNESIUM ALLOYS
ROLLING
SHEETS
STEELS
STRESSES
TENSILE PROPERTIES
TESTING