INTER-CRITICAL DEFORMATION OF A CR-NI-MO STEEL

The deformation behaviour of a chromium-nickel-molybdenum (Ci-Ni-Mo) s teel tested in the inter-critical range is studied. It is concluded th at at the start of deformation, the strain is concentrated in the weak er phase (ferrite), but as straining progresses, the austenite starts to contribute to the deformation. This change in behaviour is explaine d by the appearance of dynamic restoration, the effects of which will be more acute in the austenite due to recrystallization; that in the f errite being due to recovery.