Deformation textures in Fe3Al alloys : An assessment of dominant slip system activity in the 900-1325 K temperature range of hot working

Abstract A combination of numerical and experimental methodologies have been employed to study deformation textures in Fe 3 Al alloys produced entirely by crystallographic shears on the 〈111〉{110} + 〈111〉{112}, 〈100〉{011} and 〈100〉{001} slip systems, respectively. Numerical simulations indicate that both 〈111〉{110} + 〈111〉{112} and 〈100〉{011} slip systems produce a reasonably strong texture, while 〈100〉{001} induces no texture over the initial random configuration. Experimental texture measurements on samples deformed at deformation rates of 10 −3 –10 1 s −1 by forging, rolling and extrusion in the 925–1325 K temperature range, of the B2 structure regime, agree well with the predicted textures for the 〈111〉{110} + 〈111〉{112} slip system activation. These results appear to be in disagreement with prior transmission electron microscopy (TEM) observations that support the activation of 〈100〉{011} and 〈100〉{001} slip systems. Possible sources of discrepancies are elucidated. Finally, the loss of ductility in fully recrystallized microstructures is explained by textural reorganizations that are likely to impose larger normal stresses on the dominant {100} fracture planes.