... operation metallography niobium alloys pressure vessels scanning electron microscopy zirconium alloys Delayed hydride cracking (DHC) is an important crack initiation and growth mechanism in Zr-2.5Nb alloy pressure tubes of CANDU (Canada Deuterium Uranium) nuclear reactors. The process...

.... As a rationale for the closeness of T c to TSSD, it was suggested that the stress affects a shift of the solvus line and increases hydrogen concentrations at regions of a high tensile stress ( 4 ). hydride cracking DHC hydrogen Zr–2.5Nb zirconium cracks heating hydrogen niobium...

... niobium alloys molybdenum alloys copper alloys corrosion oxidation Given concerns over energy savings and environmental issues, it is necessary to improve thermal efficiency by raising the steam temperature and pressure of power plants. T91 and P91 having excellent creep strength were...

... initiation on flaw geometry. Agreement between engineering model predictions and experimental results is reasonable. Various aspects of the DHC initiation problem that are being addressed, in addition to flaw geometry, are described. fracture cracks crack detection niobium alloys zirconium alloys...