42 research outputs found
Interaction of Potassium With the 2 Ouabain Specific Binding-sites in Guinea-pig Heart Microsomes
Identification With Potassium and Vanadate of 2 Classes of Specific Ouabain Binding-sites in a (na+ + K+) Atpase Preparation From the Guinea-pig Heart
Pharmacological Inhibition of the Actions of Low Concentrations of Ouabain in Guinea-pig Isolated Atria
The effect of hydrogen on the crack initiation site of TRIP-assisted steels during in-situ hydrogen plasma micro-tensile testing: Leading to an improved ductility?
Contractile-force Effects of Low Concentrations of Ouabain in Isolated Guinea-pig, Rabbit, Cat, and Rat Atria and Ventricles
Electrochemical hydrogen charging to simulate hydrogen flaking in pressure vessel steels
The current study investigates hydrogen flaking in large forgings. Two industrially forged pressure vessel materials, exhibiting different segregation behavior are compared for this purpose. Electrochemical hydrogen charging is used to simulate the flakes, present in real-life applications, on a small scale. As such, the sensitivity of the materials to hydrogen flaking is assessed by varying the charging conditions in terms of time and applied current density. The resulting cracks are subsequently evaluated by optical and scanning electron microscopy. Additionally, X-ray micro-computed tomography scans are performed to generate non-destructive data on the interior performance of the tested samples. MnS inclusions are found to act as crack initiation sites. An increased number of inclusions results into a larger number of small hydrogen induced cracks, whereas less inclusions lead to a smaller number of larger hydrogen induced cracks for the same applied hydrogen charging parameters. The artificial hydrogen flakes, as introduced by electrochemical charging on lab-scale, are induced at the same locations as real-life flakes, i.e. in segregated areas along the MnS inclusions. However, differences in the exact geometry and size of the flakes are observed