Taylor simulation and experimental investigation of rolling textures of polycrystalline iron aluminides with special regard to slip on {l_brace}112{r_brace} planes
- RWTH Aachen (Germany). Inst. fuer Metallkunde und Metallphysik
The evolution of the crystallographic rolling textures of B2- and DO{sub 3}-ordered polycrystalline iron aluminides is described in terms of taylor-type simulations. The contribution of crystallographic slip on the various types of glide systems, particularly the influence of {l_brace}112{r_brace}<111> slip is examined. The evolution of the aspect ratio of the grains during rolling is considered by gradually relaxing the externally imposed strain constraints with increasing deformation. For simulating low reductions, full constraints Taylor-type conditions are assumed. For describing intermediate reductions the lath model and for large reductions the pancake model is employed. The ratio of the critical resolved shear stress of the {l_brace}110{r_brace}<111> and {l_brace}112{r_brace}<111> slip systems is varied. The predictions yielded by impeding {l_brace}110{r_brace}<111> systems and promoting {l_brace}112{r_brace}<111> systems ({tau}{sub {l_brace}110{r_brace}<111>} = 10 {times} {tau}{sub {l_brace}112{r_brace}<111>}) are in good accord with experiment. The results are discussed in terms of the energy of the antiphase boundaries and of dislocation core effects.
- OSTI ID:
- 215389
- Journal Information:
- Acta Materialia, Vol. 44, Issue 3; Other Information: PBD: Mar 1996
- Country of Publication:
- United States
- Language:
- English
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