Calculated and Experimental Orientation Distributions of Twin Lamellae in Rolled Brass

The orientation distribution of lamellae of mechanical twins in f.c.c. material is calculated with the Taylor model, the Sachs model and the “modified Sachs model” (which includes random stresses), and the calculated distributions are compared with the experimental distribution in brass rolled to 40% reduction.

The twin orientation distributions calculated with the Taylor model are rather different from that observed experimentally, whereas some of the distributions calculated with the Sachs-type models are rather close to the experimental distribution. The modified Sachs model, which reproduces the experimental twin distribution quite well, at the same time produces a good simulation of the development of the brass texture.