Cross-weld creep comparison of power plant steels CrMoV, P91 and P92

D W J Tanner, W Sun, T H Hyde

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

Abstract

Results obtained from high temperature creep tests of ferritic steel CrMoV, P91 and P92 cross-weld specimens are compared. Data is presented normalized with the results of the corresponding parent metals in order to compare the materials tested at different temperatures and stresses, and to identify characteristic cross-weld material trends.
All cross-weld failures occurred in the heat-affected zone (HAZ) adjacent to the parent metal, known as type IV, at earlier test durations than for the parent material specimens. The relative performance of the cross-welds was found to decrease with decreasing stress.
The CrMoV cross-weld specimens showed by far the lowest weld strength reduction factors and greatest notch strengthening, determined by testing uniaxially loaded bars with semi-circular circumferential notches located in the heat-affected zone.
The P91 and P92 cross-weld specimens were found to have similar (high) weld strength reduction factors and showed little or no notch strengthening. It was observed that the failure time of a P92 cross-weld specimen relative to the P92 parent material could be estimated using data from P91 cross-weld and relative parent material tests.
Original languageEnglish
Title of host publicationASME 2012 Pressure Vessels & Piping Division Conference
Place of PublicationToronto, Canada
PublisherAmerican Society of Mechanical Engineers (ASME)
Pages369-374
Volume6
DOIs
Publication statusPublished - 2012
EventASME 2012 Pressure Vessels & Piping Division Conference - Toronto, Canada
Duration: 15 Jul 201219 Jul 2012

Conference

ConferenceASME 2012 Pressure Vessels & Piping Division Conference
CountryCanada
CityToronto
Period15/07/1219/07/12

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