M. Gell, P. Worthington
Oct 1, 1966
Abstract Single and polycrystals of iron-3% silicon have been deformed in tension in the temperature range 295°K–473°K. Particular attention has been given to the presence of mechanical twinning and the role of second phases in fracture initiation, and these effects are related to the properties of the same material below 295°K. Mechanical twinning was observed at temperatures above about 360°K in fine and coarse-grained polycrystals and at 423°K in single crystals. The presence of twinning at these temperatures was associated with dynamic strain ageing. It was observed, following yielding, that both slip and twin bands can cause cracks to form in second phase particles and that these cracks can lead to complete failure.