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Technical Discussions
ezhilarasu
ezhilarasu
01:55 Nov-02-2007
UT wave velocity measurement

How wave velocity of ultrasonic waves in material is measured.
Any method available to measure velocity.

How Hydrogen embrittlement is find out using UT



 
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Tom Nelligan
Engineering,
retired, USA, Joined Nov 1998, 390

Tom Nelligan

Engineering,
retired,
USA,
Joined Nov 1998
390
04:25 Nov-02-2007
Re: UT wave velocity measurement
Any ultrasonic thickness gage or flaw detector can be used to measure sound velocity. Some instruments (like the Panametrics-NDT 35 series gages from Olympus NDT) offer direct readout of sound velocity based on an entered material thickness. For any other instrument, simply do a velocity calibration based on a material sample of known thickness and read the result.

Hydrogen embrittlement is commonly identified through a decrease in sound velocity across a known metal path. It is also associated with an increase in attenuation and scatter noise.

----------- Start Original Message -----------
: How wave velocity of ultrasonic waves in material is measured.
: Any method available to measure velocity.
: How Hydrogen embrittlement is find out using UT
------------ End Original Message ------------




 
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