Journal of the Korean Society for Nondestructive Testing (비파괴검사학회지)

The Korean Society for Nondestructive Testing (한국비파괴검사학회)
권호 표지

A Relationship between UT Reported Sizes and Actual Sizes of Defects in Rotor Forgings

  • Published : 2005.12.30
Download PDF
⟨ Previous Next ⟩

Abstract

The relationship between the EFBH (Equivalent Flat-Bottom Hole) size measured by non-destructive method and the actual size by destructive method in many rotors manufactured at Doosan Heavy Industries & Construction Co. Ltd. was investigated. In this investigation. "the Master Curve" compensating the differences between UT reported sizes and actual sizes of defects in our rotor forgings were obtainable. The applicability of this "Master Curve" as a way of calculating the actual defect size was also investigated. For the evaluation of rotor forgings, it is expected that this "Master Curve" may be used to determine the accurate actual sizes of defects.

Keywords

References

  1. Life Assessment and Improvement of Turbo generator Rotor for Fossil Power Plants Ewald, J.;Meuhle, B.;Keinburg;Viswanathan, R.(ed.)
  2. Report for Deveropment of Rotor Quality, DHlC Internal Report for Rotor Doosan Heavy Industry and Construction Co. Ltd.
  3. Eng. Fracture Mechanics v.271 Haigh, J.R.
  4. Journal of the Korean Society of Mechanical Engineers v.32 no.4 Life assessment and material Properties of Steam Turbine Components Chung, S.H.
  5. Ultrasonic Testing of Materials Krautkramer, J.
  6. Evaluation of Ultrasonic Indications near Periphery of NiMo V Generator Rotor Forgings, GE Report Kaplan, A.
  7. Evaluation of NDT Indications in Low Pressure Turbine Rotor, GE Report Kaplan, A.