Journal
CORROSION ENGINEERING SCIENCE AND TECHNOLOGY
Volume 50, Issue 5, Pages 364-371Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1179/1743278214Y.0000000230
Keywords
Stainless steel; Stress corrosion; Acoustic emission; Self-organising map
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In the present work, acoustic emission testing (AE) technique was successfully applied to identify damage phenomena occurred during stress corrosion cracking (SCC) in chloride-containing environment of a precipitation hardening martensitic stainless steel. Through the use of multivariable statistical analysis [by coupling principal component analysis (PCA) and self-organising map (SOM)], the different stages of SCC mechanisms (i.e. activation, growth and propagation of cracks) have been identified and analysed. In particular each mechanism was related to specific and significant AE patterns allowing its univocal recognition.
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