Analysis of Current and KAT (Kilo Ampere Turns) for Magnetic Particle Inspection method Chawla Nikhil1,*, Jain Vineet2 1Department of Mechanical Engineering, Shri Baba Mastnath Engineering College, Asthal Bohar, Rohtak, India 2Department of Mechanical Engineering, Amity University Haryana, Gurgaon, India *E-mail: nikhilchawla90@gmail.com, vjdj2004@gmail.com
Online published on 18 March, 2016. Abstract Magnetic Particle Inspection method is based on the basic principle that when the material or component under test is magnetised, discontinuities which lie in the direction perpendicular to the direction of the magnetic field will cause a leakage field to be formed at and above the surface of the part. The presence of this leakage field and therefore the presence of the discontinuity or crack is detected by the use of finely divided ferromagnetic particles applied over the surface. Some of these particles are being gathered and held by the leakage field. These held up particles glow up when the component is being seen in Ultra-Violet light. Depending upon the size and shape of the component under test, there is specific requirement for Magnetising Current and Kilo Ampere Turns (KAT) needed to magnetise the object, henceforth requiring a setup time or calibration of the machine with each different part. Keeping this in mind so as to reduce the setup time, a range for Current and KAT has been derived so that the parts requiring same range of Current and KAT can be clubbed together under a single setup thereby reducing the recalibration and setup time with every different part. Top Keywords Magnetic Particle Inspection, Kilo Ampere Turns, Longitudinal Current, Burn-off, Arcing, Ultra Violet Light. Top |