Influence of Heat Treatment on the Corrosion Resistance in Shape Memory Stainless Steel Based on FeMnSiCrNiCo
Sofia Salles Lantyer Marques,
Rita de Cássia Mendonça Sales-Contini,
Jorge Otubo,
Heide Heloise Bernardi
Affiliations
Sofia Salles Lantyer Marques
Technological College of São José dos Campos, Professor Jessen Vidal, Centro Paula Souza, Avenida Cesare Mansueto Giulio Lattes, 1350 Distrito Eugênio de Melo, São José dos Campos 12247-014, Brazil
Rita de Cássia Mendonça Sales-Contini
Technological College of São José dos Campos, Professor Jessen Vidal, Centro Paula Souza, Avenida Cesare Mansueto Giulio Lattes, 1350 Distrito Eugênio de Melo, São José dos Campos 12247-014, Brazil
Jorge Otubo
Departamento de Materiais e Processos, Instituto Tecnológico de Aeronáutica—ITA, São José dos Campos 12228-900, Brazil
Heide Heloise Bernardi
Technological College of São José dos Campos, Professor Jessen Vidal, Centro Paula Souza, Avenida Cesare Mansueto Giulio Lattes, 1350 Distrito Eugênio de Melo, São José dos Campos 12247-014, Brazil
In this work, the influence of heat treatment on the corrosion resistance of shape memory stainless steel based on FeMnSiCrNiCo was evaluated. Deformed samples were annealed from 250 °C to 1050 °C for 1 h. Scanning electron microscopy (SEM-EDS) and a Vickers microhardness test were used to characterize the microstructure. Thermal analysis was performed to identify phase transformations. Corrosion resistance was evaluated in an electrochemical test in a 3.5% NaCl solution. FeMnSiCrNiCo in the deformed state had better corrosion resistance compared to other conditions. However, as the annealing temperature increased, the corrosion resistance decreased due to the formation of precipitates.
