Replica test
In the construction, mechanical engineering, and petrochemical industries, replica testing is a method used to inspect the microstructure of metals (such as welds or steam pipes) without damaging the material.
The surface of a component is first carefully polished and etched. Next, a special plastic film is applied that precisely copies the microstructure of the metal.
This impression (the replica) is analyzed under a microscope in the laboratory. This allows us to determine, for example, grain size or creep class.
In this case, a replica was made on a bend of a steam pipe to demonstrate whether creep damage has occurred.
