Computerised defect sizing using ALOK analysis in shrunk-on wheel of turbine rotor |
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Authors: | T. Hirasawa I. Komura T. Akaike H. Kashiwaya M. Arii |
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Abstract: | A computerised defect evaluation system using an advanced ultrasonic technique for shrunk-on wheels of a turbine rotor has been developed. The flaw image was reconstructed by a modified ALOK method with attention to the tip diffraction echoes of stress corrosion cracking (SCC). The results of the application of this system to the mock-up wheel with artificial slits and real SCC cracks show that this system is very useful for crack sizing and locating. |
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