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Technical Discussions
Atul Deulgaonkar
Atul Deulgaonkar
07:44 May-19-2001
Ultrasonic testing of forged shaft

While testing it is observed a number of times that shafts do not give any back wall echo even at full gain and using probes of very low fequencies like 1Mhz or 0.5Mhz.
What is interpretation of this phenomenon ?


    
 
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Anonymous
Anonymous
01:27 May-19-2001
Re: Ultrasonic testing of forged shaft
: While testing it is observed a number of times that shafts do not give any back wall echo even at full gain and using probes of very low fequencies like 1Mhz or 0.5Mhz.
: What is interpretation of this phenomenon ?
.
Try various Pulse Repitition Rates and a 2.25 MHz. Transducer.


    
 
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Dr. Patel
R & D, Consultant to Universities/Industries
Fallon Ultrasonics/McMaster University, Canada, Joined May 2001, 20

Dr. Patel

R & D, Consultant to Universities/Industries
Fallon Ultrasonics/McMaster University,
Canada,
Joined May 2001
20
06:44 May-19-2001
Re: Ultrasonic testing of forged shaft
: : While testing it is observed a number of times that shafts do not give any back wall echo even at full gain and using probes of very low fequencies like 1Mhz or 0.5Mhz.
: : What is interpretation of this phenomenon ?
: .
: Try various Pulse Repitition Rates and a 2.25 MHz. Transducer.

There are many reasons for that and if you can send us details on probe diameter and contact face, PRF and energy on your pulser, perhaps we can help you interprete the phenomenon. Beam divergence, contact losses, losses due to material properties etc plays a role, however, first we have to establish the sensor and instrument you are using is OK than we can deal with other problems.

Regards

Dr. Patel



    
 
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