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- Title
Influence of the Initial Blank Geometry on the Final Thickness Distribution of the Hemispheres in Superplastic AZ31 Alloy.
- Authors
Giuliano, Gillo; Polini, Wilma
- Abstract
Featured Application: This paper presents the design of the thickness of a blank to manufacture a formed product with a more uniform thickness. A more uniform thickness in a formed product allows to avoid thinning that may involve early breaks of the part. Moreover, the obtained product is lighter and it is formed in lower time. This work deals with the design of the thickness of an AZ31 alloy blank, which is a superplastic magnesium material, to manufacture a hemisphere with a uniform final thickness. The finite element technique was used for the design process. The superplastic free-forming manufacturing was simulated for a part whose initial thicknesses were made to vary through two independent design parameters to obtain a linear thickness decrease from the pole to the end of the blank to form. This is because a linear thickness decrease is easily obtained through a machining process. The optimized blank, that is, the blank with a non-constant thickness that leads to the most uniform thickness distribution of the formed product, allows the manufacturing of a hemisphere with more uniform thickness values with a reduction in forming times and in weight in comparison with that formed by a constant initial thickness blank. At the same time, experimental tests confirmed the results highlighted by the finite element technique.
- Subjects
ALLOYS; MAGNESIUM alloys; DISTRIBUTION (Probability theory); GEOMETRY
- Publication
Applied Sciences (2076-3417), 2022, Vol 12, Issue 4, p1912
- ISSN
2076-3417
- Publication type
Article
- DOI
10.3390/app12041912