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EFFECTS OF ANNEALING ON THE MICROSTRUCTURAL EVOLUTION OF UNS S 32205 DUPLEX STAINLESS STEEL

In this work, the UNS S32205 duplex stainless steel as-received and annealed were cold rolling with 75% and 80% thickness reduction, respectively, and annealed at 900, 1000 and 1100°C for 180s followed by water-cooling. The microstructure was characterized by scanning electron microscopy, X-ray diffractometry and electron backscatter diffraction. The alpha-ferrite microtexture presented alpha-fiber and rotated cube components after annealing. Only 1100°C A sample showed typical recrystallization texture. The austenite showed the brass, Goss, copper, cube and S components. A probably strain-induced martensite transformation at cold rolling of NA sample and a reverse strain-induced martensitic transformation of ferrite into austenite when the sample is annealed were noticed.