ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Series of slow strain rate tests (SSRT) were conducted on moderately sensitizedaustenitic stainless steel in diluted aqueous solution of sodium thiosulfate at ambient temperatureand pressure. Only a small area of the test piece was exposed to test solution and electrochemicalpotential transients obtained during the straining was used to detect an initiation or a precursorevent of stress corrosion crack (SCC). Tests were stopped intermittently after getting potentialtransients, so as not to allow crack to propagate and to observe the morphology of very initial stageof SCC initiation site. Visual observation by scanning electron microscope (SEM) before and afterthe test shows direct correlation between electrochemical transient of certain characteristic to thecrack initiation. SEM observation shows δ- ferrite in the alloy as one of the preferential SCCinitiation site for typical electrochemical transient. Attempt was made to calculate the chargeassociated with crack initiation event from potential transient using dummy anode test
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.353-358.2387.pdf
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