where expertise comes together - since 1996

Web's Largest Portal of Nondestructive Testing (NDT)
Open Access Database (Conference Proceedings, Articles, News), Exhibition, Forum, Network

All Forum Boards
Technical Discussions >
Ultrasonic testing of forged shaft
Career Discussions
Job Offers
Job Seeks
Classified Ads
About NDT.net
Articles & News

475 views
07:44 May-19-2001
Atul Deulgaonkar
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 ?


 
01:27 May-19-2001
Anonymous
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.


 
06:44 May-19-2001

Dr. Patel

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



 


© NDT.net - The Web's Largest Portal of Nondestructive Testing (NDT) ISSN 1435-4934

Open Access Database, |Conference Proceedings| |Articles| |News| |Exhibition| |Forum| |Professional Network|