Title

Finite Element Simulation of Selective Superplastic Forming of Friction Stir Processed 7075 Al Alloy

Abstract

For many superplastically formed components, only some regions undergo superplastic deformation. In these cases, instead of choosing expensive starting sheet material with superplastic properties, a low-cost, conventional material can be chosen and friction stir processing (FSP) can be performed in the selected regions to impart superplastic properties locally. This is called “selective superplastic forming” [R.S. Mishra, M.W. Mahoney, US Patent 6,712,916, 2002]. In this study, finite element simulation of superplastic forming of a bowl shape component with inhomogeneous properties has been conducted. We chose commercial 7075 Al alloy as the starting material and FSP was used to generate fine grains in some regions. The pressure schedule, the overall forming time and the final thickness distribution in the formed component were calculated. This simulation demonstrates the design possibilities with this new concept.

Department(s)

Materials Science and Engineering

Sponsor(s)

National Science Foundation (U.S.)

Keywords and Phrases

Aluminum Alloy; Finite Element Simulation; Friction Stir Processing; Selective Superplastic Forming

Library of Congress Subject Headings

Aluminum alloys

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2006 Elsevier, All rights reserved.

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