Instrumentation and Control of a Bulge Test on a Superplastic Pb-Sn Alloy

Abstract:

Superplasticity is characterized by high elongations under a high strain rate sensibility, and it’s variation with strain rate, temperature and grain size. This parameter is often obtained from uniaxial tensile test. However, superplastic deformation is a biaxial process; hence there is a need to develop a way to get this parameter in a biaxial test. This work aims to set up the instrumentation to record and control a biaxial superplastic forming in a Pb-Sn alloy. The control system project has been divided into tracking variables: strain and pressure. The instrumentation is able to predict the breaking point at the beginning of the superplastic forming process from biaxial testing.

• Periodical: Materials Science Forum (Volume 735)
• Pages: 224-231
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.735.224
• Online since: December 2012
• Authors: Erick Petta Marinho, Alberto Sakata, Erika Fernanda Prados, Gilmar Ferreira Batalha
• Keywords: Bulge Test, Digital Image Correlation (DIC), Pb-Sn Alloy, Superplasticity

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