Keto Ring And Ac: A Cool Combo?

The Ketos ring is a tool used to evaluate and compare the performance and sensitivity of dry and wet, fluorescent and non-fluorescent magnetic particle techniques. It is made from AISI-O1 tool steel and is used as a system performance indicator in the magnetic particle testing (MT) process. The number of holes in the ring indicates the relative sensitivity of the system in use. While the Ketos ring is typically used with DC current, it can also be used with AC current. However, AC current will only pick up the first one or two holes on the ring.

The Ketos ring is used for system performance checks

The Ketos ring is a tool used for system performance checks. It is used to evaluate and compare the overall performance and sensitivity of both dry and wet, fluorescent and nonfluorescent magnetic particle techniques. This is done using a central conductor magnetization technique, where a circular magnetization is applied by a D.C. current through a central conductor. The number of indications formed on the outer rim of the ring indicates the relative sensitivity of the system in use.

The Ketos ring is also used to ensure that a Magnetic Particle Inspection (MPI) process is suitable for detecting a certain type of defect. The test is performed by mounting the ring on a central conductor in a threader bar configuration with the ring at 90 degrees to a coil centreline. By applying a current flow shot through the threader bar, defects in the ring can be seen around its circumference in a series of lines. The number of lines formed indicates the system's performance.

The Ketos ring is also used to detect defects on surfaces or slightly sub-surface that cannot be seen unaided. This is known as Non-Destructive Testing (NDT), which is a critical inspection procedure that will define whether the examined material is safe for use, needs to be discarded, or repaired. The Ketos ring is often used interchangeably with the AS5282 ring for NDT. However, the AS5282 ring has more holes and is better able to detect deeper holes.

When performing system performance checks with the Ketos ring, it is important to ensure that the correct verification tools are used to ensure the NDT method is working correctly. This is crucial for the inspection's success in detecting defects before the material fails in service.

AC current will only pick up the first one or two holes on the ring

The Ketos Ring is a tool used in evaluating and comparing the overall performance and sensitivity of both dry and wet, fluorescent and nonfluorescent magnetic particle techniques. It is a test ring specimen that uses a central conductor magnetization technique.

The number of indications formed on the outer rim of the ring indicates the relative sensitivity of the system in use. The magnetic suspension is applied on the ring, and magnetic powder accumulates on the ring edge over the cylindrical holes, forming indication lines.

When using AC current with the Ketos Ring, only the first one or two holes will be picked up. This is because AC magnetization is commonly used for the detection of surface-breaking defects, as AC fields are known to agitate particles more effectively on part surfaces.

The Ketos Ring is, therefore, more suitable for use with DC current, which is used for the detection of slightly sub-surface discontinuities. This is due to the nature of the Ketos Ring's construction, with holes drilled at different depths from the ring's outer circumference. The holes closest to the outer circumference simulate shallow defects, while the holes closest to the centre simulate deep sub-surface discontinuities.

In summary, while the Ketos Ring can be used with AC current, it is more effective with DC current due to the arrangement of holes and the nature of AC and DC magnetization.

The Ketos ring is used to evaluate and compare the performance and sensitivity of magnetic particle techniques

The Ketos ring is a tool used to evaluate and compare the performance and sensitivity of magnetic particle techniques. It is a test ring specimen fabricated from AISI 01 tool steel, with a hardness range of 90 to 95 HRB. The ring is used to assess both dry and wet, fluorescent and non-fluorescent magnetic particle techniques, employing a central conductor magnetization technique.

The process involves applying circular magnetization through a D.C. current passing through a central conductor, creating leakage fields that decrease as the distance from the hole to the ring edge increases. When the magnetic suspension is applied, magnetic powder builds up on the ring edge, forming indication lines. The number of these lines indicates the relative sensitivity of the system, allowing for adjustments if the prescribed number of indications is not met.

The Ketos ring plays a crucial role in magnetic particle testing (MT), serving as a gauge to determine the machine's overall system condition. It is used as a daily systems test, logged for each machine in operation. The ring is designed for use with machines that have a DC output waveform, including half-wave direct current (HWDC) and full-wave direct current (FWDC) configurations.

While the Ketos ring is primarily associated with DC current, there is some discussion about its compatibility with AC current. According to a user named George Hopman on an NDT forum, AC current will only pick up the first one or two holes on the Ketos steel ring. ITW Magnaflux offers an AC performance fixture, indicating that AC machines may require different equipment for accurate testing.

The number of indications formed on the outer rim of the ring indicates the relative sensitivity of the system

The Ketos Ring is a tool used to evaluate and compare the overall performance and sensitivity of both dry and wet, fluorescent and nonfluorescent magnetic particle techniques. It is fabricated from AISI 01 tool steel and is 5″ in diameter and .875″ thick, with a 1″ diameter centre hole. The number of indications formed on the outer rim of the ring indicates the relative sensitivity of the system in use.

The overall performance and sensitivity of the magnetic particle system are tested using a central conductor magnetization technique. Circular magnetization is applied by a D.C. current through a central conductor, and the leakage fields appear, decreasing as the distance from the hole to the ring edge increases. When the magnetic suspension is applied to the ring, magnetic powder accumulates on the ring edge over the cylindrical holes, forming indication lines. The number of indication lines formed on the outer rim of the ring indicates the relative sensitivity of the system. If the prescribed number of indications cannot be detected, the magnetic particles, suspension, magnetizing techniques, or equipment must be checked and corrected.

The Ketos Ring is used to check the overall performance of the magnetic particle examination system. It meets the requirements of ASTM-E-1444, AS5282, and P&W. The ring includes 12 through-holes at .070″ diameter and distances of .070, .140, .210, .280, .350, .420, .490, .560, .630, .700, .770, and .840″ from the OD surface.

When testing the Ketos Ring, there are no calculations. If you set your machine to output 1400 Amps, you should see 3 holes when magnetising with FWDC and a wet suspension; 5 holes at 2500 Amps; and 6 holes at 3400 Amps. If you do not obtain the number of holes required, there may be an issue with your bath, electrical connections, or the Ketos ring itself.

The Ketos ring is used to ensure an MPI process is suitable for detecting a type of defect

The Ketos ring is a tool used in non-destructive testing (NDT) to evaluate and compare the overall performance and sensitivity of both dry and wet, fluorescent and non-fluorescent magnetic particle techniques. It is a test ring specimen fabricated from AISI 01 tool steel cut from annealed round stock, with a hardness range of 90 to 95 HRB. The test ring is used to ensure that an MPI (Magnetic Particle Inspection) process is suitable for detecting a type of defect.

The Ketos ring is made up of a series of pre-drilled holes at increasing depths below the surface, used to simulate sub-surface defects. The distance of the holes to the surface increases as you move to holes of increasing number. Its original purpose was to demonstrate the ability to use MPI to find sub-surface flaws. However, it has been used to perform regular performance evaluations of MPI bench systems. The intensity of the indication depends on the depth of the flaw and the amount of current passed through a central bar conductor.

When performing a test, the Ketos ring is mounted on a central conductor in a threader bar configuration with the ring at 90 degrees to a coil centreline. By applying a current flow through the threader bar, defects in the ring can be seen around its circumference in a series of lines. The number of indications formed on the outer rim of the ring indicates the relative sensitivity of the system in use. If the prescribed number of indications cannot be detected, the magnetic particles, suspension, magnetizing techniques, or equipment must be checked and corrected.

The Ketos ring is particularly useful for detecting defects on surfaces or slightly sub-surface that cannot be seen unaided. It is an important tool for engineers and asset owners in various industries, including automotive, rail, aerospace, and more, as it allows them to operate or use materials with confidence.

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