Theoretical and experimental study of carburisation and decarburisation of a meta-stable austenitic steel



Título del documento: Theoretical and experimental study of carburisation and decarburisation of a meta-stable austenitic steel
Revista: Materials research
Base de datos: PERIÓDICA
Número de sistema: 000312856
ISSN: 1516-1439
Autores: 1


Instituciones: 1University of Siegen, Siegen, Nordrhein-Westfalen. Alemania
Año:
Periodo: Oct-Dic
Volumen: 8
Número: 4
Paginación: 469-474
País: Brasil
Idioma: Inglés
Tipo de documento: Nota breve o noticia
Enfoque: Experimental
Resumen en inglés Metastable austenitic stainless steels are known to undergo a partial transformation of austenite to martensite as a consequence of plastic deformation. In the case of cyclic loading, a certain level of plastic strain must be exceeded, and phase formation takes place after an incubation period, during which the necessary amount of plastic deformation is accumulated. The susceptibility of the austenitic phase to deformation-induced martensite formation is strongly affected by the temperature of loading and the stability of austenite, which itself depends on the chemical composition. A key element in this regard is carbon which stabilizes the austenitic phase. It is shown in this study that the carbon concentration can be analysed systematically and reproducible by means of annealing treatments, if the parameters of these treatments are carefully defined on the basis of advanced theoretical thermodynamic and kinetic considerations. First results on the effect of carbon concentration and temperature of fatigue testing on the austenite/martensite transformation are presented, in order to illustrate the significance of these parameters on the martensite formation rate
Disciplinas: Ingeniería
Palabras clave: Ingeniería de materiales,
Ingeniería metalúrgica,
Acero inoxidable,
Tratamiento térmico,
Martensita,
Propiedades mecánicas,
Fatiga de materiales
Keyword: Engineering,
Materials engineering,
Metallurgical engineering,
Stainless steel,
Thermal treatment,
Martensite,
Mechanical properties,
Materials fatigue
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