Experimental apparatus for thermal shock fatigue investigations

Brian B Kerezsi, A G Kotousov, John W Price

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27 Citations (Scopus)


An experimental rig developed for investigating crack growth in pressure vessels and piping equipment is described. The rig allows full scale modeling of cyclic thermal shock conditions that occur in operating thermal power station pressure equipment. It has the ability to apply a primary steady state mechanical load and to control the quenching environment allowing the study of the effect of welds and stress concentrators under conditions that simulate operational loadings. These results can be used for lifetime assessment.

Preliminary results from the test rig analysing the effect of primary load on crack initiation and growth are presented and discussed briefly. A comparison with prediction methods from the ASME Boiler and Pressure Vessel Code is made. It is concluded that the primary load has little or no effect on crack initiation times, however it significantly affects the crack growth rate.
Original languageEnglish
Pages (from-to)425-434
Number of pages10
JournalInternational Journal of Pressure Vessels and Piping
Issue number7
Publication statusPublished - 2000

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