Magnetic particle testing

This method involves magnetization of the sample coated with a liquid dispersion of magnetic particles, and then observing the magnetic medium patterns. Discontinuities in the samples result in indications in the magnetic medium patterns different from normal patterns. The type and origin of the discontinuity along with the pattern of indication are noted below. 

Forging laps Twist cracks Surface tears 

Located in crankshaft forgings and appear on the surface of twisted area surface rupture 

straight surface flaws parallel to the longitudinal axis of the bar 

Occur due to improper rolling and appear similar to seams 

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Our method consists in the use of all magnetic particles testing techniques and to bear in mind the physical approach and the different processes combinations. 

Automated Magnetic Particle Testing of Truck Spindles. 

Some Aspects on the Reliability of Magnetic Particle Testing. 

Detailed view of the magnetic particle testing device... 

Magnetic particle separation, 15 435 Magnetic particle testing (MT), piping system, 19 485... 

The adopted methods were x-ray radiography (RT-X), especially concerning circumferential and longitudinal joints magnetic particle testing (MT) ultrasonics (UT) tensile and cold-bend test macroscopic sections hardness test metallographic examinations microanalysis (EDS) SANS. 

Figure 6-2. Magnetic particle testing is used to detect discontinuities such as fine surface or subsurface cracks.

General corrosion control, prevention, and monitoring should be planned for from the onset. To detect and monitor corrosion, various methods must be used, while corrosion protection would be done by the addition of inhibition and use of protection coatings [5]. Visual examination, laser methods, the replication microscopy liquid penetration testing method, magnetic particles testing, the eddy current inspection method, acoustic emission technique, thermal methods of inspection, and nondestructive methods are the various methods to be adopted when monitoring pipeline corrosion [5]. 

Dye penetration/magnetic particles tests— to detect cracks in welded joints... 

Magnetic particle test, ultrasonic test, dye penetrant, radiographic test, etc. 

Typical manufacturing sequence of an RPV component (shell). UT, ultrasonic test DT, dimensional test MT, magnetic particle test VT, visual test PT, liquid penetration test NDE, non-destructive examination PWHT, post-weld heat treatment. 

Butt welds in the inner core cylinder are radiographed in accordance with the Code. The balance of seams attaching each layer are magnetic particle tested. 

Th. J. Schmidt, K. Skeie, and P. Mclntire, eds.. Nondestructive Testing Handbook, Vol. 6 Magnetic Particle Testing, 2nd ed., American Society for Nondestructive Testing, Columbus, Ohio, 1989. 

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