| The objective of the project concerns the setting up of appropriate methods to characterize some aerospace alloys for appropriate process modeling of aerospace components by tube hydroforming. In fact, the aerospace industry is interested in the possibilities of tube hydroforming technology to manufacture generic component prototypes because of its many advantages such as weight and cost reduction. In order to do so, understanding the mechanical behavior during hydroforming-type deformation is considered critical. The materials under investigation are Stainless Steel 321, Stainless Steel 17-4 PH and Superalloy Inconel 718. At the end, the appropriate constitutive laws of these alloys are extracted according to several specimens' geometries and various metallurgical states. This study comes as an essential experimental base needed to build valid and robust material models simulating hydroforming. In addition, it develops a step by step reliable characterization method. The appropriate hardening coefficients of several constitutive laws which could be integrated into the Finite Element Analysis will be discussed.;Keywords: tube hydroforming, aerospace alloys, tensile tests, free expansion tests, hardening laws... |
