ultrasonics test

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• Nondestructive testing — or Non destructive testing (NDT) is a wide group of analysis techniques used in science and industry to evaluate the properties of a material, component or system without causing damage.[1] The terms Nondestructive examination (NDE),… …   Wikipedia

• materials testing — Introduction       measurement of the characteristics and behaviour of such substances as metals, ceramics, or plastics under various conditions. The data thus obtained can be used in specifying the suitability of materials for various… …   Universalium

• Ultrasonic cleaning — An ultrasonic cleaner is a cleaning device that uses ultrasound (usually from 15 400 kHz) and an appropriate cleaning solution to clean delicate items. The ultrasound is not effective without the cleaning solution; it enhances the effect of a… …   Wikipedia

• Ultrasonic testing — Step 1 : The UT probe is placed on the root of the blades to be inspected with the help of a special borescope tool (video probe). Step 2 : Instrument settings are input. Step 3 : The probe is scanned over the blade root. In this case, an… …   Wikipedia

• Electro Magnetic Acoustic Transducer — An Electro Magnetic Acoustic Transducer (EMAT), is a non contact inspection device that generates an ultrasonic pulse in the part or sample inspected, instead of the transducer. The waves reflected by the sample induce a varying electric current… …   Wikipedia

• Ultrasound — Not to be confused with Supersonic .Ultrasound is cyclic sound pressure with a frequency greater than the upper limit of human hearing. Although this limit varies from person to person, it is approximately 20 kilohertz (20,000 hertz) in healthy,… …   Wikipedia

• Air Force Research Laboratory — Emblem of AFRL …   Wikipedia

• tunnels and underground excavations — ▪ engineering Introduction        Great tunnels of the world Great tunnels of the worldhorizontal underground passageway produced by excavation or occasionally by nature s action in dissolving a soluble rock, such as limestone. A vertical opening …   Universalium

• United States Air Force Research Laboratory — Infobox Military Unit unit name= Air Force Research Laboratory caption=Emblem of AFRL dates= October 1997–Present country= United States branch= Air Force type= Research and development size= 4,200 civilian 1,200 military command structure= Air… …   Wikipedia

• YFM-1 Airacuda — infobox Aircraft name =YFM 1 Airacuda type = Interceptor Bomber destroyer manufacturer =Bell Aircraft caption = designer = Bob Woods first flight = 28 September avyear|1939Angelucci, 1987. pp. 39 41.] introduced = 23 February 1940 last… …   Wikipedia

• Quartz crystal microbalance — A quartz crystal microbalance (QCM) measures a mass per unit area by measuring the change in frequency of a quartz crystal resonator. The resonance is disturbed by the addition or removal of a small mass due to oxide growth/decay or film… …   Wikipedia