Title: Acoustic Emission Monitoring of Slow Strain Rate Tensile Tests of 304L Stainless Steel in Supercritical Water Environment
Authors: MATHIS KristianPRCHAL DusanNOVOTNY RadekHAEHNER Peter
Citation: CORROSION SCIENCE vol. 53 no. 1 p. 59-63
Publication Year: 2011
JRC N°: JRC62450
ISSN: 0010-938X
URI: www.elsevier.com/ locate/corsci
DOI: 10.1016/j.corsci.2010.09.006
Type: Articles in periodicals and books
Abstract: An experimental set-up has been developed to perform slow strain rate tensile (SSRT) tests on tubular 304L stainless steel (SS) specimens in supercritical water (SCW) environment (550oC, 250 bar). The supercritical water is circulated inside an internally pressurized tubular specimen mounted into a universal mechanical test rig and heated by a single loop resistance beating furnace. The set-up enables in situ monitoring of acoustic emission and electrochemical potential during the SSRT test. The SCW environment is found to significantly influence the mechanical performance of the material as a result of corrosion processes. A correlation between acoustic emission response and change of electrochemical potential is revealed. The findings are compared with preliminary results of tests performed on bulk SS specimens under the same condition in a commercial autoclave. The advantages and potentialities of both set-ups are discussed.
JRC Directorate:Energy, Transport and Climate

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