Applications
Notes d’application
Detection of Hydrogen-Induced Cracking (HIC)
Hydrogen-induced cracking (HIC) can occur in susceptible steels exposed to aqueous environments containing hydrogen sulphides. It is a form of hydrogen-related cracking and can have two distinct morphologies: 1. The first type is commonly referred to as hydrogen-induced cracking (HIC) and can occur where little or no applied or residual tensile stress exists. It is manifested as blisters or blister cracks oriented parallel to the plate surface. 2. The second type produces an array of blister cracks linked together in the through thickness direction by transgranular cleavage cracks. The latter type of cracking is referred to as stress-oriented hydrogen-induced cracking (SOHIC). SOHIC can have a greater effect on serviceability than HIC because it effectively reduces load carrying capabilities to a greater degree. The inspection requires characterization of the defect areas to differentiate between spot inclusions, laminations, and different stages of hydrogen-induced cracking (HIC). The benefit of electronic angle sweeping (S-scans) provided by the OmniScan™ allows simultaneous scanning from −30 to +30 degrees. The imaging from this scanning technique allows the user to distinguish between spot indications and interconnected defects. Typical Inspection Requirements
A 0-degree raster scan is used to find the area that has laminations. Then the phased array probe using the −30- to +30-degree S-scan setup is manually scanned over on the areas where defects have been found to determine if there is a link between those defects. Screen shots and reports of the defect can be immediately created for later printouts. |
General Description of the ApplicationProducts used for this application
OmniScan MX
L'OmniScan MX est un appareil de recherche de défauts de pointe intégrant de multiples technologies. Il offre un haut taux d'acquisition et des fonctions logicielles puissantes intégrées dans un boîtier portable et modulaire qui permettent des inspections manuelles et automatisées efficaces. Modules ultrasons conventionnels, ultrasons multiéléments, courants de Foucault et courants de Foucault multiéléments disponibles.OmniScan MX2NEW
L'appareil de recherche de défauts par ultrasons multiéléments OmniScan MX2 avec écran tactile permet des inspections de grande efficacité. Il inclut des fonctionnalités logicielles puissantes qui permettent une performance d'inspection manuelle et d'inspection automatisée supérieure et des configurations, des cycles d'essai et une production de rapports rapides. Il est compatible avec tous les modules multiéléments existants.Logiciel TomoView
TomoView est un logiciel pour PC qui permet l'acquisition de données et la visualisation des signaux ultrasonores.
