Produção Nacional
Microstructure evaluation of UNS S32205 duplex stainless steel friction stir welds
2013; SciELO; Volume: 66; Issue: 2 Linguagem: Inglês
10.1590/s0370-44672013000200008
ISSN1807-0353
AutoresTiago Felipe de Abreu Santos, Ricardo Reppold Marinho, Marcelo Torres Piza Paes, Antonio J. Ramírez,
Tópico(s)Aluminum Alloy Microstructure Properties
ResumoUNS S32205 duplex stainless steel welds were performed by friction stir welding (FSW). Advancing and retreating sides showed distinct characteristics in the welded joint. The advancing side shows the strongest grain refinement which is corroborated by microhardness measurements. The microstructure characterization was carried out by optical, scanning and transmission electron microscopy. The thermomechanically affected zone displays austenite islands deformed in a ferrite matrix. The stir zone (SZ) showed a fine recrystallized microstructure providing an outstanding increase of hardness associated with better corrosion performance. Transmission electron microscopy and corrosion tests have corroborated the absence of intermetallic phases on welded joints.
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