High temperature, low cycle fatigue characterization of P91 weld and heat affected zone material

Farragher, T.P. and Scully, S. and O'Dowd, N.P. and Hyde, Christopher J. and Leen, S.B. (2014) High temperature, low cycle fatigue characterization of P91 weld and heat affected zone material. Journal of Pressure Vessel Technology, 136 (2). 021403/1-021403/10. ISSN 1528-8978

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Abstract

The high temperature low cycle fatigue behavior of P91 weld metal (WM) and weld joints (cross-weld) is presented. Strain-controlled tests have been carried out at 400 °C and 500 °C. The cyclic behavior of the weld material (WM) and cross-weld (CW) specimens are compared with previously published base material (BM) tests. The weld material is shown to give a significantly harder and stiffer stress–strain response than both the base material and the cross-weld material. The cross-weld tests exhibited a cyclic stress–strain response, which was similar to that of the base material. All specimen types exhibited cyclic softening but the degree of softening exhibited by the cross-weld specimens was lower than that of the base material and all-weld tests. Finite element models of the base metal, weld metal and cross-weld test specimens are developed and employed for identification of the cyclic viscoplasticity material parameters. Heat affected zone (HAZ) cracking was observed for the cross-weld tests.

Item Type: Article
Additional Information: Paper No: PVT-13-1088
Schools/Departments: University of Nottingham, UK > Faculty of Engineering > Department of Mechanical, Materials and Manufacturing Engineering
Identification Number: 10.1115/1.4025943
Depositing User: Eprints, Support
Date Deposited: 19 Sep 2017 10:24
Last Modified: 14 Oct 2017 08:27
URI: http://eprints.nottingham.ac.uk/id/eprint/46484

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