Pit Depth measurement in Rotary Turbine Blades.

Updated 5 days ago in Service Related
3 on January 11, 2018

What is the right way for measuring Pitt depth in pitting corrosion on the rotary turbine blades.

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0 6 days ago

Digital Radiography is a term that includes with DDA‘s (digital detector arrays) and CR (computed radiography – imaging plates).  Real Time Radiography may be performed with CCD cameras but are being replaced, at least in aerospace usage with DDA’s.  DDA’s frame rates will vary with the size detector and pixel density but 15 fps (frames per second) to 30 fps are common and can improve detectability with respect to a still image by providing motion.  Think how an animal such as rabbit freezes when it doesn’t want to be detected but as soon as it moves, it is easily noticed.  DDA’s can be used for both 2D (two dimensional) radiography and CT (computed tomography).

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0 5 days ago

Hi,

Digital Radiography is a good technique to quickly image the defects in the components. Another technique which is a great tool to size the pitting would be a 3D laser-based technique such as 3D Tool Box would quickly scan and give the depth range and dimension. The accuracy of the technique depends on the type of pitting. a shallow wide pit would give accurate results than very tight pits. 

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0 5 days ago

Hi,

Digital Radiography is a good technique to quickly image the defects in the components. Another technique which is a great tool to size the pitting would be a 3D laser-based technique such as 3D Tool Box would quickly scan and give the depth range and dimension. The accuracy of the technique depends on the type of pitting. a shallow wide pit would give accurate results than very tight pits. 

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