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IHI Inspection & Instrumentation Co., Ltd.

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Damage inspection and countermeasure proposals

Damage Inspection and Countermeasure Proposals

The cause of damage can be made clear through a detailed inspection of damaged parts. If the cause is not identified, the same problem may occur again. IIC provides inspection services for damaged machines and parts, proposes effective countermeasures and gives suitable advice for avoiding future problems.

SEM observation of fatigue fracture

Stress-corrosion cracking (SCC) of stainless steel

Striation pattern is characteristic of fatigue fracture

Cleavage fracture pattern is characteristic of brittle fracture

Methods of damage investigation

  • Surface observation: Condition of damage, starting point of crack growth, measurement of deformation, observation of corrosion.
  • Observation of fracture surface: Observation of fracture surface using a scanning electron microscope (SEM) to clarify damage features.
  • Microscopic and macroscopic observation: Observation of metallurgical structure to clarify problems related to damage.
  • Materials examination: Chemical analysis to confirm suitable material selection.
  • Mechanical testing: Mechanical testing of component materials to confirm strength levels.
  • Microscopic observation of welds: Observation of weld defects and poor welds.

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