Pavel Podany
COMTES FHT a.s., Czech Republic
Title: Effect of heat treatment on precipitation behaviour of intermetallic phases in duplex steel
Biography
Biography: Pavel Podany
Abstract
The precipitation of intermetallics at grain boundaries occurs when duplex stainless steel is exposed in some temperature ranges. For example, heat treatment between 500 – 1000 °C can cause the formation of a friable sigma phase in duplex stainless steel. The effects of the annealing temperature on the microstructure were investigated by means of dilatometric measurements, optical microscopy, scanning electron microscopy and EBSD. The analyses describe the precipitation kinetics of sigma and other intermetallic phases in particular grade of duplex steel, which is necessary to know to avoid decreasing of corrosion resistance and mechanical properties which are strictly connected to presence of intermetallics in the microstructure.
Speaker Presentations