The development of the microstructure was studied in a high-purity bi-crystal with a (112)[111] or (123)[412] orientation. The latter was deformed to 90% by compression in a channel die. The boundary plane of the bi-crystal was located at the middle of the width, along the length of the crystals, and was inclined at 20 to the plane of compression. The deformation microstructure in both crystals was heterogeneous. In particular, shear bands with relatively large local misorientations formed in the (112)[111] crystals. The orientation of the (112)[111] crystal was stable during deformation, whereas the (123)[412] crystal changed to (011)[311]. Intragranular nucleation occurred in shear bands in the (112)[111] crystal, and an approximate <111> rotation relationship existed between the orientation of the nuclei and the deformed matrix.

Y.L.Liu, H.Hu, N.Hansen: Acta Metallurgica et Materialia, 1995, 43[6], 2395-405