Original title: Development of Creep Damage in Similar Weld Joints of P92 Steel Pipe
Authors: Král, Petr ; Sklenička, Václav ; Kuchařová, Květa ; Svobodová, M. ; Kvapilová, Marie ; Dvořák, Jiří
Document type: Papers
Conference/Event: CCMPPS 2017 - Conference on Contribution of Metallography to Production Problem Solutions /14./, Mariánske Lázně (CZ), 20170606
Year: 2017
Language: eng
Abstract: The microstructure and creep behaviour of the welded joints of P92 steel pipe were\ninvestigated in order to determine the influence of orbital heat welding technology on the creep\nresistance. Creep specimens were machined from the welded joints. Tensile creep tests of welded\njoints were performed at 873 K using different stresses. The microstructure of tested specimens was\ninvestigated by scanning electron microscope Tescan equipped with an electron-back scatter\ndiffraction. The creep results showed that the creep fracture strain of the welded joints decreases\nwith decreasing value of applied stress. Microstructure investigation showed that fracture behaviour\nof welded joints is influenced by an enhanced cavity formation at grain boundaries in the heataffected\nzone causing lower fracture ductility.
Keywords: creep damage; creep fracture; microstructure; P92 steel; welding
Project no.: GA16-09518S (CEP)
Funding provider: GA ČR
Host item entry: Contribution of Metallography to Production Problem Solutions II, ISBN 978-3-0357-1241-4, ISSN 1662-9779

Institution: Institute of Physics of Materials AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0279305

Permalink: http://www.nusl.cz/ntk/nusl-373338


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