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Technical Discussions
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

Tom Nelligan
retired, USA, Joined Nov 1998, 390

Tom Nelligan

Joined Nov 1998
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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