This standard defines terms used in magnetic particle testing as a common basis for standards and general use.
2 Terms and Definitions
2.1
A.C. electromagnet yoke
yoke connected to the AC power
2.2
alternating current
current whose magnitude and direction vary sinusoidally with time, is indicated by the symbol AC
2.3
alternating current field
conductor is connected to an alternating current, and a magnetic field is induced inside and around the conductor
2.4
alternating current magnetization
magnetization with a magnetic field generated by an alternating current inductor
2.5
ampere
unit of current, abbreviated as A or amp
2.6
ampere per meter
magnetic field strength at the center of the coil when a single-turn coil of 1 m in diameter is used in the air with a current of 1 A. Abbreviated as A?m-1 or A/m
2.7
ampere turns
product of the number of turns of a coil and the current in amperes flowing through the coil
?
2.8
arc
glow caused by discharge when an electric current passes through a gas clearance
2.9
arc strikes
partial burn damage of a component due to poor electrical contact
2.10
axial current flow
component is clamped along the axis between the two magnetic chucks of the flaw detector to allow current to flow directly through the component to be inspected, creating a closed circular magnetic field on the surface and inside of the component
2.11
black light
ultraviolet light with a wavelength of 320 nm to 400 nm (3 200 ? to 4 000 ?), i.e. UV-A
2.12
black light filter
filter that absorbs other wavelengths but allows near-ultraviolet transmission
2.13
cancel magnetic field
when the ferromagnetic material is magnetized, the magnetic field generated by the magnetic poles in the material is a cancel magnetic field, which weakens the external magnetic field
2.14
central conductor
electric conductor positioned in the centre of an aperture of the component is energized to form a circular magnetic field on the component after current flow
2.15
circular magnetic field
magnetic field generated inside and around the component when current flow through the elongated conductor
2.16
circular magnetization
current flows directly through the component or through the central conductor, generating a circumferentially closed magnetic field in the component that surrounds it and is perpendicular to it's long axis
GB/T 12604.5-2008 The following standards are cited：
GB/T 12604.5-2008 Cited by the following standards：
