Difference between revisions of "Ultrasonic testing"

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(Synonyms and Related Terms)
(Description)
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== Description ==
 
== Description ==
  
A nondestructive method used to characterize physical properties of materials. Ultrasonic testing can be used on many types of materials to check for inhomogeneities. Varying frequencies are required to penetrate different types of materials, i.e. for a 0.5 inch plate of steel (1-5 mHz ), for plastics (0.5 mHz) and for concrete (0.1 mHz). Ultrasonic vibrations are used to check porosity, liquid levels, temperature, viscosity and density.
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Ultrasonic testing (UT) is together with radiography one of the more used nondestructive testing method. This technique was first described in 1940 by the American physicist Floyd Firestone & patented in 1942 as a "Flaw detecting device and measuring nstrument". 
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[[Ultrasound]] with frequencies ranging from 0.1-15 MHz and occasionally up to 50 MHz are transmitted into materials to detect generally by reflection (& in some case, by transmission) internal flaws or to characterise physical properties of materials. A common example is ultrasonic thickness measurement. Ultrasonic testing is often performed on steel and other metals and alloys, though it can also be used on concrete, stone, wood..., albeit with less resolution.
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In the cultural heritage area, this technique, often as a complement to radiography permits to examine statues, archaeological artefacts, historical building structures, industrial heritage artefacts... to detect defects like cracks, unbondings, delaminations, voids, porosities, slags, inclusions..., to estimate importance of inner corrosion, or to localise interfaces of two componants...  
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== Synonyms and Related Terms ==
 
== Synonyms and Related Terms ==

Revision as of 07:55, 1 February 2014

Description

Ultrasonic testing (UT) is together with radiography one of the more used nondestructive testing method. This technique was first described in 1940 by the American physicist Floyd Firestone & patented in 1942 as a "Flaw detecting device and measuring nstrument". Ultrasound with frequencies ranging from 0.1-15 MHz and occasionally up to 50 MHz are transmitted into materials to detect generally by reflection (& in some case, by transmission) internal flaws or to characterise physical properties of materials. A common example is ultrasonic thickness measurement. Ultrasonic testing is often performed on steel and other metals and alloys, though it can also be used on concrete, stone, wood..., albeit with less resolution. In the cultural heritage area, this technique, often as a complement to radiography permits to examine statues, archaeological artefacts, historical building structures, industrial heritage artefacts... to detect defects like cracks, unbondings, delaminations, voids, porosities, slags, inclusions..., to estimate importance of inner corrosion, or to localise interfaces of two componants...

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Synonyms and Related Terms

contrôle par ultrasons (Fr.); Ultraschallprüfung (Deut.)


Additional information

  • A.S. Buirks, R.E.Green & P. McIntire, Nondestructive Testing Handbook, 3rd edition: Vol 7, Ultrasonic Testing, ISBN: 978-1-57117-105-4, ASNT, Columbus OH (2007)

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