Conference Proceedings Paper
STRESS CORROSION CRACKING TESTING IN SCW - RESULTS OF SSRT TESTS
The 5th International Symposium on SuperCritical Water-cooled Reactors - 2011 March 13-16
Radek Novotny (Joint Research Center Petten)
Peter Hähner (Joint Research Center Petten)
Premysl Janik (Joint Research Center Petten)
Jan Siegl (Czech Technical University)
Petr Haušild (Czech Technical University)
Stefan Ripplinger (Joint Research Center Petten)
The presented paper summarizes the results of stress corrosion cracking (SCC) susceptibility tests in supercritical water (SCW) for austenitic alloys 316L, 316NG, 347HP and Alloy 690 with the aim to identify the maximum applicable SCW temperature and specific failure mechanisms prevailing during slow strain-rate tensile (SSRT) tests in ultra-pure demineralized SCW solution with controlled oxygen content. In addition to the strain rate, which was controlled by the crosshead speed, the oxygen content was varied in the series of tests in the case of austenitic stainless steel 316L. The fractography confirmed that failure was due to a combination of transgranular SCC and transgranular ductile fracture. Based on fractographic findings a phenomenological map describing the SCC regime of SSRT test conditions was proposed for AISI 316L.
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