American Testing Services - Dayton - Ohio

Services

ATS offers a wide variety of capabilities ranging from conventional NDT services through advanced inspection technologies. We can provide you with these services:

	Magnetic Particle Inspection Liquid Penetrant Inspection Ultrasonic Inspection Eddy Current Inspection	Visual Inspection Radiographic Inspection ACFM Inspection

We are able to mobilize virtually every NDT method to the field that we do in our laboratory. Click on the link for a more information on each service.

Magnetic Particle Inspection
Magnetic Particle testing is done by inducing a magnetic field in a ferro-magnetic material and dusting the surface with iron particles (either dry or suspended liquid). Surface imperfections will distort the magnetic field and concentrate the iron particles near the imperfections, thus indicating their presence. Return to Top

Liquid Penetrant Inspection
Liquid Penetrating testing is probably the most widely used NDT method. The test object or material is coated with a visible or fluorescent dye solution. The excess dye is removed from the surface, and then a developer is applied. The developer acts like a blotter and draws penetrant out of imperfections that are open to the surface. With visible dyes, the vivid color contrast between the penetrant and the developer makes the "bleed out" easy to see. With fluorescent dyes, an ultraviolet lamp is used to make the "bleed out" fluoresce brightly, thus allowing the imperfection to be seen readily. Return to Top

Ultrasonic Inspection
Ultrasonic testing uses the transmission of high frequency sound waves into a material to detect imperfections within the material or changes in material properties. The most commonly used ultrasonic testing technique is the pulse echo wherein sound is introduced into the test object and reflections (echoes') are returned to a receiver from internal imperfections or from geometrical surfaces of the part. Return to Top

Eddy Current Inspection
In Eddy current testing, electrical currents are generated in a conductive material by an induced magnetic field. Interruptions in the flow of the electric currents (eddy currents), which are caused by imperfections or changes in a material's conductive properties, will cause changes in the induced magnetic field. These changes, when detected, indicate the presence of a change in the test object. Return to Top

Visual Inspection
Probably the oldest and most common method of NDT is visual examination, which has numerous industrial and commercial applications. Examiners follow procedures ranging from simple to very complex, some of which involve comparison of workmanship samples with production parts. Visual techniques are used with all other NDT methods. Return to Top

Radiographic Inspection
Radiography involves the use of penetrating X or gamma radiation to examine parts and products for imperfections. An X-ray machine or radioactive isotope is used as a source of radiation. Radiation is directed through a part and onto film. When the film is developed, a shadowgraph is obtained that shows the internal soundness of a part. Possible imperfections show up as density changes in the film, in much the same manner as an X-ray can show broken bones. Return to Top

American Testing Services, Ltd.

2268 North Moraine Drive w Dayton, Ohio w 45439
Phone 937 298 9390 w w Fax 937 298 9429