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Phone: +91-80-2573 0691
contact@scientechservices.com
Scientech Services
No. 15, Singasandra, 14th K.M.
Hosur Road,
Bangalore - 560 068
Fax: +91-80-2573 0719 |
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The term radiography often refers to the specific radiological method that produces a permanent image on film (conventional radiography) or paper (paper radiography or xeroradiography). In a broad sense, however, radiography can also refer to other radiological techniques that can produce two dimensional, plane-view images from the unabsorbed radiation. |
| Film or paper Radiography: A two-dimensional latent image from the projected radiation is produced on a sheet of film or paper that has been exposed to the unabsorbed radiation passing through the testpiece. This technique requires subsequent development of the exposed film of paper so that the latent image becomes visible for viewing.
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| Real-time Radiography (also known as radioscopy): A two-dimensional image can be immediately displayed on a viewing screen or television monitor. This technique does not involve the creation of a latent image; instead, the unabsorbed radiation is converted into an optical or electronic signal, which can be viewed immediately or can be processed in near real time with electronic and video equipment. |
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| Principles: Ultrasonic testing is a nondestructive method in which beams of sound waves at a frequency too high to hear are introduced into materials for the detection of surface and subsurface discontinuities in the material. These acoustic waves travel through the material with some attendant loss of energy (attenuation) and are reflected at interfaces. The reflected bean is displayed (or reduces the display of transmitted sound) and is then analyzed to define the presence and locations of discontinuities or discontinuities. |
| Applications: Ultrasonic testing of metals is widely used, principally for the detection of discontinuities. This method can be used to detect internal discontinutities in most engineering metals and alloys. Bonds produced by welding, brazing, soldering and adhesive bonding can also be ultrasonically examined. Inline techniques have been developed for monitoring and classifying materials as acceptable, salvageable or scrap and for process control. Other applications include testing of piping and pressure vessels, nuclear systems, motor vehicles, machinery, structures, railroad rolling stock and bridges and thickness measurement. |
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