Alhoty

Non-Destructive Testing Insitu Metallography (replica)

Boilers, heat exchangers and reactors are typically examined during annual maintenance shutdowns. The non-destructive testing technique in-situ metallography is ideal for studying the microstructure of metallic components during this time. It can be completed without requiring material extraction for laboratory examination. In-situ metallography is suitable for evaluating post weld heat treatment processes and for verifying the weld microstructure of crack tip opening dynamics (CTOD) for large-scale fracture mechanic specimens prior to notching.

Insitu Metallography (replica)

Alhoty completes in-situ metallography examination by examining a polished and etched surface with a portable microscope fitted with a digital camera or through laboratory examination of a replica of the microstructure made from resins or plastic in a laboratory.

Alhoty’s In-situ Metallography is applicable for:

  • Remaining life assessment.
  • High temperature & high-pressure component health assessment
  • Post-fire damage assessment of fire affected equipment
  • Process quality assessment: Check efficacy of metallurgical processes such as heat treatment
  • Data generation on imported components for indigenization
  • Failure Investigations.
  • Weld inspection for repair preparation

Alhoty’s In-situ Metallography is suitable for identifying damage caused by the following:

  • Graphitization
  • Degradation of pearlite
  • Creep
  • Thermal Fatigue
  • Oxidation
  • Grain growth
  • Hydrogen Attack
  • Stress Corrosion Cracking
  • Sigma phase