Recently Completed Electrical Discharge Sampling Equipment (EDSE) Project in Europe

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A European based company approached ETD to submit a proposal on cutting samples of very small thickness (1mm or less) from pieces of a ring segment and a combustor basket. The work on the ring segment and combustor basket supplied to ETD by the client was carried out at the ETD site by one of our engineers. One sample was cut from the ring segment and one from the combustor basket. This is to understand the interface between the coating and the substrate. Before cutting out the specimen from the combustor basket the area around the piece to be cut out was cleaned of the ceramic coating and then a thin piece cut out by our EDSE. Photos and videos were made of the cutting process and all samples sent back to the client.

The EDSE was developed by ETD in collaboration with international partners to aid in the condition and life assessment of components. The sampling of in-service components has long been seen as an effective way of determining actual material properties and sub-surface material condition. However, many of the existing methods of sample removal require mechanical cutting which can deform the surface and usually require weld repair. Unlike the traditional mechanical ‘boat sampler’, with EDSE, the surface damage if any is of the level of only a few microns. EDSE can also be used to cut out specimens for small punch testing and miniature creep, fatigue or tensile testing for more accurate quantitative life assessment.

For more information on our EDSE services, please click here.