Microstructure and flow behaviour during backward extrusion of semi-solid 7075 aluminium alloy
Article dans une revue avec comité de lecture
Date
2012Journal
Journal of Materials Processing TechnologyAbstract
The microstructure and flow behaviour during thixo backward extrusion of 7075 aluminium alloy were investigated. Reheating the steel die and the aluminium billet placed into the die at the same time using an induction furnace provides rapidly a very homogeneous microstructure suitable for thixoforming. During thixoextrusion, despite the high solid fraction, the solid globules are weakly connected and slide over each other without any plastic deformation. The flow remains quasi homogeneous resulting in homogeneous induced microstructure of the component.
Files in this item
Related items
Showing items related by title, author, creator and subject.
-
Article dans une revue avec comité de lectureThe deformation behavior of semi-solid aluminum alloy is strongly dependent on the microstructure. This paper illustrates several experimental research works concerning thixoextrusion of 7075 aluminum alloy which was carried ...
-
Article dans une revue avec comité de lectureBROT, Grégoire; KOUTIRI, Imade; BONNAND, Vincent; FAVIER, VERONIQUE; DUPUY, Corinne; RANC, Nicolas; AIMEDIEU, Patrick; LEFEBVRE, Fabien; HAUTEVILLE, Robin (2023)This work aims to analyze the sensitivity of the very high-cycle fatigue behavior of LPBF-Ti-6Al-4V to microstructure and porosity variations. To do so ultrasonic fatigue testing is performed on five grades of LPBF-Ti-6Al-4V. ...
-
Chapitre d'ouvrage scientifiqueNumerical simulation of semisolid processing can be carried out using one- or two-phase modeling. Various models based from either fluid or solid mechanics formalisms were developed. The most sophisticated one-phase models ...
-
Direct measurement of local constitutive relations, at the micrometre scale, in bulk metallic alloys Article dans une revue avec comité de lecturePLANCHER, E; MAURICE, C; FAVIER, VERONIQUE; LOISNARD, D; RUPIN, N; MARIJON, Jean-Baptiste; MICHA, Jean-Sébastien; ROBACH, Odile; CASTELNAU, Olivier; BOSSO, E; STODOLNA, J; PETIT, J (International Union of Crystallography, 2017)Multiscale models involving crystal plasticity are essential to predict the elastoplastic behavior of structural materials with respect to their microstructure. However, those models are often limited by a poor knowledge ...
-
Article dans une revue avec comité de lectureCHEBIL, Gwenaëlle; LAPOUGE, Pierre; RENOLLET, Yves; DAVOINE, Cécile; THOMAS, Marc; FAVIER, VERONIQUE; SCHNEIDER, Matthieu (Laser Institute of America, 2021-11)During L-PBF process on aluminum alloys, instabilities such as spatter ejections result from the laser-matter interaction. These spatters create a variety of defects and affect the mechanical properties of the final parts. ...