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.
|Titolo:||Characterization of a superplastic titanium alloy with an experimental and numerical approach based on free-inflation tests|
|Data di pubblicazione:||2016|
|Nome del convegno:||12th International Conference on Superplasticity in Advanced Materials, ICSAM 2015|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.4028/www.scientific.net/MSF.838-839.177|
|Appare nelle tipologie:||4.1 Contributo in Atti di convegno|