NDT Inspection Method Applicability

Replication is a follow-on inspection technique to assist in further evaluating surface indications. It involves polishing an indication, application and development of a wetted film, and subsequent visual examination under high magnification. Replication essentially transfers the part's surface topography to the film for examination under a microscope.

It is commonly used as a follow-up to Blue Etch Anodize (BEA) on titanium to enhance a material segregation indication. It can also be used after any etch process.

In general, replication as an NDT method can be applied at any point during the manufacture and/or in-service use of an applicable part. Replication can be applied to nearly any material. Surface defects as small as grains can be reliably detected with replication and subsequent magnification. 
  

Replication of titanium surface under 100x magnification showing stringer Alpha segregation

We offer replication on an "as required" basis in most applications (i.e., to further evaluate indications). It can also be provided on a more continuous basis. For example, to assist in Research & Development or manufacturing process troubleshooting and/or optimization efforts.