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Quick-break
| Глоссарий терминов по технологиям неразрушающего контроля (NDT) |
Sometimes called “fast break.” the sudden breaking of a direct current causes a transient current to be induced in the part by the rapid collapse of the magnetic field. in magnetic particle testing, fast-breaking of the magnetizing current is used to generate a transient current in a part that is favorable for finding transverse defects at the ends of longitudinally magnetized bars. such defects are often concealed by the strong polarity at the bar ends. at such locations, the lines of force of the longitudinal field are leaving the bar in a direction normal to the surface, which prevents them from intercepting transverse defects in those areas. the field induced by the transient current does intercept such discontinuities.
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Transverse, английский
- Across. a transverse section is a section across the length of a building or room.
- Поперечный
- Directions in wood at right angles to the wood fibers
- Perpendicular to the keel (athwartship).
- Across the vessel; athwartships. trim - fore and aft balance of a boat.
- Literally, “across,” usually signifying a direction or plane perpendicular to the direction of working.
Magnetized, английский
A body is said to be magnetized when it possesses or can be made to possess that peculiar property whereby under certain circumstances it will naturally attract or repel a similar body in accordance with magnetic laws, example: drill rods become magnetized in use and will strongly attract other iron or steel articles.
Longitudinal, английский
- Generally parallel to the direction of the wood fibres.
- Продольный
- Generally, parallel to the direction of the wood fibers.
- Продольный, относящийся к долготе, стрингер
- [1] extending in the lengthwise direction, as distinguished from transverse. [2] said of any fore-and-aft structural member, such as a frame or bulkhead.
- Running lengthwise.
- Along the length of a structure.
- Direction parallel to the long axis of an object and perpendicular to its radius — for example, down the length of a cylinder. compare circumferential; radial; transverse. lot tolerance percent defective (ltpd): the poorest quality, in percent defective, individual lot that is acceptable in a sampling plan. ltpd is the percent defective that will be accepted by the sampling plan at most 10 percent of the time. with such a plan, the producer agrees to supply just enough nonconforming product such the consumer will accept the lot using the agreed to sampling plan and acceptable quality level. compare acceptable quality level. lumen (lm): si photometric unit of luminous flux, weighted according to the photopic vision response. one lumen equals the light emitted by one candela (cd) point source into one steradian (sr) solid angle (1 lm = 1 cd/sr).
Intercepting, английский
Перехват
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Focused beam (ut), английский
Sound beam that converges to a focal spot.
Degreasing fluid, английский
- Solvents or cleaners employed to remove oil and grease from the surface of components before the penetrant liquid is applied.
- Chemical cleaning agents used to remove contaminants from test surfaces before inspection. see also cleaning, chemical.
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