Rheological behaviour of lamellar eutectic AlAl 2 Cu elaborated by induction heating

This paper presents solutions to the experimental problems encountered in the elaboration of lamellar AlAl 2 Cu or fibrous AlAl 3 Ni eutectic samples using the Bridgman technique. The objective is to prepare samples for use in mechanical tests. The investigation of the elaborated structures of AlAl 2 Cu (orientation, grain selection, shape of the solid‐liquid (S.L.) interface, interlamellar spacing λ…) can then be used to confirm the predicted behavior. Creep tests under constant applied stress σ (from 2 to 5 · 10 7 N/m 2 ) at temperatures from 300 to 450 °C show: – that a stationary state exists (with constant strain rate\documentclass{article}\pagestyle{empty}\begin{document}$$ \dot \varepsilon $$\end{document} ) – the influence of an imperfect orientation – the existence of a Bailey‐Norton creep law\documentclass{article}\pagestyle{empty}\begin{document}$$ \dot \varepsilon $$\end{document}= k σ n . This law leads to the possiblity of finding a constitutive equation for high temperatures tests.