http://hdl.handle.net/2117/3165 Thu, 23 May 2013 14:49:10 GMT 2013-05-23T14:49:10Z webmaster.bupc@upc.edu Universitat Politècnica de Catalunya. Servei de Biblioteques i Documentació no http://hdl.handle.net/2117/14187 Title: Cyclic deformation of duplex stainless steels Authors: Mateo García, Antonio Manuel; Gironés, Ana Abstract: Duplex stainless steels configure a family of metallic alloys that combined elevated mechanical properties with improved corrosion resistance when compared to standard austenitic grades. This excellent combination of properties leads to their use under many different applications, particularly in the fields of chemical, petrochemical, pulp and paper industries. Moreover, these applications usually involve cyclic loading, and consequently the study of fatigue properties has a great significance for reliable design and safe-operation. This chapter is devoted to study and analyze the cyclic deformation response of duplex stainless steels under standard testing conditions. The first point studied is the fatigue behavior of a duplex stainless steel corresponding to the last generation or superduplex. The cyclic stress-strain curve (CSSC) was determined through a wide interval of plastic strain amplitudes by incremental fatigue tests. Afterwards, constant total strain amplitude fatigue tests were performed at four different total strain amplitude values, values that correspond to marked different positions within the CSSC. TEM analysis of the different substructures developed within both constituent phases, i.e. austenite and ferrite, was done for each plastic strain amplitude. Finally, results obtained for the superduplex steel are compared to those reported for other duplex with lower nitrogen content tested under similar experimental conditions. Wed, 07 Dec 2011 15:57:21 GMT http://hdl.handle.net/2117/14187 2011-12-07T15:57:21Z Mateo García, Antonio Manuel; Gironés, Ana no Duplex stainless steels configure a family of metallic alloys that combined elevated mechanical properties with improved corrosion resistance when compared to standard austenitic grades. This excellent combination of properties leads to their use under many different applications, particularly in the fields of chemical, petrochemical, pulp and paper industries. Moreover, these applications usually involve cyclic loading, and consequently the study of fatigue properties has a great significance for reliable design and safe-operation. This chapter is devoted to study and analyze the cyclic deformation response of duplex stainless steels under standard testing conditions. The first point studied is the fatigue behavior of a duplex stainless steel corresponding to the last generation or superduplex. The cyclic stress-strain curve (CSSC) was determined through a wide interval of plastic strain amplitudes by incremental fatigue tests. Afterwards, constant total strain amplitude fatigue tests were performed at four different total strain amplitude values, values that correspond to marked different positions within the CSSC. TEM analysis of the different substructures developed within both constituent phases, i.e. austenite and ferrite, was done for each plastic strain amplitude. Finally, results obtained for the superduplex steel are compared to those reported for other duplex with lower nitrogen content tested under similar experimental conditions. http://hdl.handle.net/2117/14186 Title: Blisk fabrication by LFW Authors: Mateo García, Antonio Manuel Wed, 07 Dec 2011 15:52:32 GMT http://hdl.handle.net/2117/14186 2011-12-07T15:52:32Z Mateo García, Antonio Manuel no