Non Destructive Testing
Micro Precision Ltd offer a unique service to the Aerospace and Formula 1 industries, in the form of an all inclusive manufacturing package that now encompasses Non Destructive Testing (NDT).
Micro Precision has a substantial department dedicated to NDT within the “ONE STOP” manufacturing facility, in Hemel Hempstead.
We have a high level of staff qualification and equipment standards to ensure full compliance with Prime Contractor Specifications, on site and without the delays associated with using an outside service.
Magnetic Particle Inspection (MPI) or Magnetic Flaw Detection (MFD)
For detection or surface and slight subsurface imperfections and indications on ferromagnetic materials, including materials that have been treated with a non-magnetic coating.
Dye Penetrant Inspection
Liquid Penetrant Inspection (LPI) or Penetrant Flaw Detection (PFD).
Utilising fluorescent techniques for the detection of surface imperfections and conditions on all material, regardless of their mechanical or material properties, such as metals, plastics, composite materials etc.
Etch Inspection
Used for detecting grinding abuse, particularly in Hardened surfaces. The technique involves a sequence of acid etches which highlight the soft or hard phases produced by poor and inconsistent grinding.
Magnetic Particle Bench
Many materials have a certain degree of magnetism, thus the use of magnetics to locate flaws within the material is ideal for many test situations. Magnetic Particle Testing involves the use of a surface application while the part is being magnetized Iron particles sprayed on the surface of the material adhere to surface flaws, identifying the location and size. The iron particles may be applied dry or wet, suspended in a liquid, coloured or fluorescent. For more sensitivity, ultraviolet lights are used during the testing process to enhance the visibility of even the smallest discontinuity. From one piece to ten thousand, each customer is assured a rigid adherence to industry standards.
Fluorescent or Dye Penetrant (FP)
The surface of the part under evaluation is coated with a penetrant in which a visible or fluorescent dye is dissolved or suspended. The penetrant is pulled into surface defects by capillary action. After a waiting period to ensure the dye has penetrated into the narrowest cracks, the excess penetrant is cleaned from the surface of the sample. A white powder, called developer, is then sprayed or dusted over the part. The developer lifts the penetrant out of the defect, and the dye stains the developer. Then by visual inspection under white or ultraviolet light, the visible or fluorescent dye indications, respectively, are located, thereby defining the defect.
- 2 Magnetic Particle Inspection bench units, covering all ferromagnetic parts up to 66" in length and up to 12" dia.
- All assessors are ASNT Level 2 qualified, with Level 3 services available in all NDT disciplines
- Fully NAMAS calibrated equipment
Examples of Applications:
- Detection of cracking and porosity in welded joints
- Detection of surface defects in castings
- Detection of fatigue cracking in stressed materials
Plant List:
- 2 Water washable dye penetrant tanks
- 2 Post-emulsifiable penetrant tanks
- 3 Drying Ovens
- 2 Storm Cabinets
- 3 Uva viewing booths
Magnetic Particle Bench
Dye Penetrant Tanks