Creep is a high temperature damage mechanism of interest to the power industry and at
present lacks a satisfactory inspection technique. Existing material inspection techniques
are extremely laborious while strain measurements rely on often infrequent off-load
measurements. A quasi-DC directional potential drop technique has been suggested that is
able to suppress the effects of permeability and is primarily sensitive to changes in resistivity
and also the geometry that will develop through strain. The change in creep related …