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Forensic solutions in
real-world applications

Explore detailed case studies showcasing how our forensic engineering
expertise has solved complex industry challenges.

Case Study

Major CRIFS Cases List

  • 01The appropriateness of early replacement of temporary repair products for PGC
    • Analysis of appropriateness of repair and replacement of PGC damaged in fire accident
    • Analysis of reports and review opinions related to repair of damaged products, evaluation of residual stress and tensile properties by instrumented indentation test

    Change in morphology and indentation force-depth curve with stress variation, illustrating the influence of stress changes on the material's response to indentation

  • 02Damage to outdoor fire extinguishing buried pipes at nuclear power plant
    • Review appraisal requests based on provided documents and related materials
    • Appraisal Request:
      • - Whether damaged HDPE pipes meet KS standards and whether characteristics can change over time
      • - Is it possible for cracks, brittle fracture, and rapid crack growth to occur in HDPE pipes?

    Schematic diagram of fracture energy of
    brittle and ductile materials

    Example of ductile fracture of PE pipe

    Example of rapid crack growth and
    failure of PE pipe

  • 03Damage to main bearing of wind power plant
    • Analysis of causes of damage to main bearings of operating wind power plants
    • Analysis includes:
      • - Review of various materials related to bearing design, production, training and operation
      • - Bearing materials and grease analysis
      • - Observe the damage pattern of broken bearings

    Example of raceway path pattern

    Example of fretting corrosion

    Example of geometric stress
    concentration spalling

  • 04Rotor blade damage of turbine generator at power plant
    • Arc discharge, dislodgement, and cracks occur in the steam turbine generator's fixing bar.
    • Analyzing the cause of the accident by reviewing production, construction and operation data and observing damaged products
  • 05Breakage of half-circular nut
    • Material integrity analysis of a half-circular nut that was damaged in a short period of time during use
    • Analysis details: visual inspection of damaged area. fracture macro and microstructure observation, fracture surface SEM and EDS observation, tensile test, impact test

    Macro-structure observation

    SEM / EDS analysis

  • 06Clutch disc damage
    • Analysis of defects in damaged clutch discs
    • Analysis details: composition analysis, hardness and strength measurement, microstructure and fracture surface observation
  • 07Tower crane collapse
    • Analysis of the cause of damage to bolts connecting the turntable and cap mast of a tower crane
    • Fracture surface observation (SEM), composition analysis, material property (tensile, fracture toughness, hardness) evaluation, and microstructure observation (OM)
  • 08Defects in high-pressure water heater heat pipes
    • Analysis of the causes of stress corrosion cracking in high pressure water heater heat pipes
    • Hardness measurement, crack and fracture surface observation, composition analysis, and residual stress evaluation
    Check of crack origin and path through fracture surface observation
    Observation of cracks and base material/weld microstructure
  • 09Explosion of CNG pressure vessel
  • 10Crack in battery terminal
    • Analysis of the causes of cracks in vehicle battery terminals
    • Microstructure inspection, hardness test and crack fracture surface analysis

    Hardness test

    Microstructure observation

    Fracture analysis