Abstract
The 2195 Al-Cu-Li alloy is able to obtain an elongation of 203% by high temperature stretching. The microstructure evolution and deformation mechanism of non-recrystallized Al-Cu-Li alloy after high temperature stretching were studied. The results show that the inhomogeneous grain structure is the main factor affecting the elongation. High resolution surface studies with focus ion beam show that intragranular dislocation slip provides up to 57% of the total strain and grain boundary sliding plays an accommodating role.
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