Characterization of a Superplastic Titanium Alloy with an Experimental and Numerical Approach Based on Free-Inflation Tests

Abstract:

It’s well known that the microstructure dramatically affects the strain behaviour of superplastic materials. Virtually, each batch should be characterized ex novo: optimal ranges of temperature and strain rate as well as material constants have to be defined. An accurate and simple characterization methodology based on a strain condition close enough to the real forming process is of great industrial interest. In this work, a characterization methodology based on an experimental and numerical approach is proposed. Experimental free inflation tests with a pressure jump were carried out on a titanium alloy. Results were used as reference data for an inverse analysis based on the height evolution of the dome. Material constants were calculated by means of a genetic algorithm. The approach was verified with further experimental results and a good correlation was found.

• Periodical: Materials Science Forum (Volumes 838-839)
• Pages: 177-182
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.838-839.177
• Online since: January 2016
• Authors: Donato Sorgente*, Antonio Piccininni, Vito Piglionico, Pasquale Guglielmi, Dario Grossi, Gianfranco Palumbo, Luigi Tricarico
• Keywords: Characterization, Inverse Analysis, Pressure Jump Test, Superplasticity, Titanium Alloy

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