Cyclic softening behaviour of a P91 steel under low cycle fatigue at high temperature

A. A. Saad, W. Sun, T. H. Hyde, D. W. J. Tanner

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

41 Citations (Scopus)

Abstract

This paper describes a model used to represent the cyclic mechanical behaviour of P91 martensitic steel. Low cycle fatigue tests were conducted at 600 °C using a thermo-mechanical fatigue test machine. A unified, Chaboche viscoplasticity model, was used to model the behaviour of the steel. The micro structure of the steel at different life fractions of the tests was investigated using scanning and transmission electron microscope images. The viscoplasticity model, with two stages of softening period, has resulted in better prediction capability for the cyclic behaviour of the steel for an initially undamaged material prior to crack initiation.
Original languageEnglish
Title of host publication11th International Conference on the Mechanical Behavior of Materials (ICM11)
Place of PublicationLake Como, Italy
DOIs
Publication statusPublished - 2011
Event11th International Conference on the Mechanical Behavior of Materials (ICM11) - Como, Italy
Duration: 5 Jun 20119 Jun 2011

Conference

Conference11th International Conference on the Mechanical Behavior of Materials (ICM11)
CountryItaly
CityComo
Period5/06/119/06/11

Keywords

  • Viscoplasticity model P91 steel Cyclic softening FE prediction Microstructural evolution

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