Importance of austenitization temperature and ausforming on creep strength in 9Cr ferritic/martensitic steel. (August 2018)

• Record Type: Journal Article
• Authors: Vivas, J.; Capdevila, C.; Altstadt, E.; Houska, M.; San-Martín, D.
• Is Part Of: Scripta materialia. Number 153(2018)
• Page Start: 14
• Page End: 18
• Publication Date: 2018-08
• Subjects: Small punch creep tests -- MX nanoprecipitates -- Creep ductility -- Ausforming -- Creep resistant steels; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2018.04.038
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Small Punch Creep technique was used as a screening procedure to evaluate the creep properties of different microstructures developed in a thermomechanical simulator. The goal seek was to generate alternative microstructures in a conventional ferritic-martensitic G91 steel grade which boost thermal stability at temperatures as high as 700 °C. The developed microstructures allow studying the effect of the austenitization temperature optimized by thermodynamic calculations and the ausforming on the creep strength and ductility. The improvement in creep strength recorded was attributable to a higher number density of MX precipitates. By contrast, these microstructures showed an important reduction in creep ductility. Graphical abstract: Unlabelled Image