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Title:
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Effect of severe plastic deformation on microstructure and properties of duplex stainless steel
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Author:
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Gennari, C.; Pezzato, L.; Llorca Isern, Núria; Lopez, I.; Cabrera Marrero, José M.; Chand, M.; Roca, A.; Calliari, Irene
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Other authors:
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Universitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica; Universitat Politècnica de Catalunya. PROCOMAME - Processos de Conformació de Materials Metàl·lics |
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Abstract:
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The excellent performance of dduplex and super duplex stainless steels due to their high corrosion resistance and high mechanical strength is directly related to their austeno-ferritic microstructure. However, these steels may suffer the formation of secondary brittle phases when they reach temperatures 600-950°C,
with catastrophic service failure of components. In order to understand the influence of the mechanical history of the steel, the equal channel angular
pressing (ECAP) was applied on UNS S32750 bar samples, processed by using a hydraulic press (DE-80). Microstructural characterisation was carried out on the severe plastic deformed samples by means of OM, SEM and EBSD. Ultimate tensile strength has improved with a low decreasing of elongation after the first
pass. The hardness evolution of the same samples was also evaluated. |
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Abstract:
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Peer Reviewed |
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Subject(s):
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-Àrees temàtiques de la UPC::Enginyeria química
-Stainless steel
-Duplex stainless steels
-Severe plastic deformation
-ECAP
-Grain refinement
-Acer inoxidable |
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Rights:
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Document type:
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Article - Submitted version
Article |
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