International Hydrogen Conference (IHC 2012): Hydrogen-Materials Interactions
54 In-situ Detection of Deuterium in Duplex Stainless Steels by Time-of-Flight Secondary Ion Mass Spectrometry (TOF-SIMS)
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Local in-situ measurements of hydrogen distribution in the microstructure become increasingly important to elucidate the degradation mechanisms. In contrast to other attempts, modern TOF-SIMS instruments might provide precise element and phase mappings at sub-μm lateral resolution, enabling imaging of the microstructure and analysis of the chemical composition. Such technique has thus been applied to image the deuterium distribution in duplex stainless steel microstructures. After electrochemical charging, accumulations of deuterium have been detected in the austenite grains, causing parallel cracking in this phase which up to the present has been regarded as less prone to hydrogen or deuterium deterioration in comparison...