Identificación de Fases y Precipitados por MFA en Uniones de Acero Inoxidable Dúplex
AUTOR(ES)
López, María Eugenia Herrera, Delgado, Eduardo Hurtado, Torres, David Torres, Morquecho, Ana María Arizmendi
FONTE
Soldag. insp.
DATA DE PUBLICAÇÃO
2016-06
RESUMO
Abstract Atomic Force Microscopy (AFM) is a characterization technique that generates topographic images of surfaces at very high resolutions, and operates recording details of surface relief of material with a cantilever that moves on the sample, while a piezoelectric detector monitors changes in height. It acquires relevance in the field of identification phase, particles and precipitation at nanoscale level so, it is proposed for identification in the fusion zone of welded components and for the early identification of failures by cracking. It is a technique that does not require conductive samples, or special preparation of metallographic specimens such as electron microscopy. The study material is a duplex stainless steel 2205, joined by Gas Metal Arc Welding (GTAW). This material was performed tensile test. The specimens were characterized by optical microscopy, scanning electron microscopy, atomic force microscopy and nanoindentation tests. Results focus on the identification of the magnetic characteristics, and specific topography of each of the phases, regions and particles present in the base metal and weld zone as well in the crack deformed by fracture.
Documentos Relacionados
- Identificación de precipitados en aleaciones U-Nb-Zr tratadas térmicamente a 850 ºC
- Uso de técnicas electroquímicas para determinar la resistencia a la corrosión localizada de un acero inoxidable súper dúplex UNS S-32760
- Fabricación de recubrimientos compuestos de Bioglass®/poli(ɛ-capro-lactona) obtenidos por co-deposición electroforética sobre acero inoxidable
- El carbón vegetal en Brasil y la producción de acero.
- Evolución microestructural de un acero inoxidable superdúplex bajo ciclos térmicos de corta duración