CORRELATING EBSD WITH ULTRASONIC MEASUREMENTS OF CRYSTALLOGRAPHIC TEXTURE IN METALS

The quantitative measurement of crystallographic texture through determination of the Orientation Distribution Coefficients (ODCs) can provide critical information on a sample?s suitability for being utilised in a particular manufacturing process or can be used to measure changes in the microstructure of components in service. Ultrasonic techniques have been developed by previous workers that measure these ODCs. Electron Backscatter Diffraction (EBSD), a microscopic technique that measures the crystallographic orientations of individual crystals, has been utilised to offer an alternative method to measuring these ODCs. As a technique, EBSD provides a much more detailed measurementof texture than ultrasonic measurements ever could. Ultrasonic methods are however non-destructive, can be used on components in service and are quicker and less expensiveto implement that EBSD measurements. EBSD is isa valuable method in validating ultrasonic measurements, and can help to guide us in determining the limitations of the ultrasonic measurements. Ultrasonic measurement of texture is, and will continue to be a useful approach to measuring texture, but it does have its limitations and advantages for application to "real world" samples.