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TWI is a world leading research and technology organisation established in 1946. From bases in the UK, USA, China, Malaysia, Middle East, India a ...

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Technical Discussions
Rich Roberts
Engineering, Executive Managment
Quest Integrity Group, USA, Joined Nov 1998, 78

Rich Roberts

Engineering, Executive Managment
Quest Integrity Group,
USA,
Joined Nov 1998
78
08:21 Oct-02-2004
Transducer Wear Face

We have designed a piece of ultrasonic equipment housing numerous (64) ultrasonic compression transducers. This equipment is exposed to a very harsh environment. Recently we have noticed that a lot of the transducer wear faces have been worn off, exposing a silver metallic material. The transducer continues to perform properly, however we are concerned with degradation of the signal quality if the silver metallic material were to become damaged. Could someone recommend a repair method (preferable some type of adhesive) which we can apply to the transducers front face? We have tried various types of epoxy, however this material tends to attenuate the signal below acceptable levels. Any recommendations would be greatly appreciated.



    
 
 
N.Kuppusamy
Consultant, NDT Level-III Engineer
Advanced Inspection & Testing (S) Pte Ltd, Singapore, Joined Dec 2003, 34

N.Kuppusamy

Consultant, NDT Level-III Engineer
Advanced Inspection & Testing (S) Pte Ltd,
Singapore,
Joined Dec 2003
34
04:10 Oct-03-2004
Re: Transducer Wear Face
Hi Mr.Rich Roberts,
Why don't you experiment with some metal (stainless steel, etc) wear faces. It may prove to be beneficial in many fronts such as improving coupling efficiency, Excellent wear resistance. You may design it as a detachable attachment (threading mechnism)on regular probe design. You may encounter problems with high thermal conductivity of metals, and I think it can be resolved by experiment and improving design.
Best Regards,
N.Kuppusamy

----------- Start Original Message -----------
: We have designed a piece of ultrasonic equipment housing numerous (64) ultrasonic compression transducers. This equipment is exposed to a very harsh environment. Recently we have noticed that a lot of the transducer wear faces have been worn off, exposing a silver metallic material. The transducer continues to perform properly, however we are concerned with degradation of the signal quality if the silver metallic material were to become damaged. Could someone recommend a repair method (preferable some type of adhesive) which we can apply to the transducers front face? We have tried various types of epoxy, however this material tends to attenuate the signal below acceptable levels. Any recommendations would be greatly appreciated.
------------ End Original Message ------------




    
 
 
Ed Ginzel
R & D, -
Materials Research Institute, Canada, Joined Nov 1998, 1252

Ed Ginzel

R & D, -
Materials Research Institute,
Canada,
Joined Nov 1998
1252
06:32 Oct-03-2004
Re: Transducer Wear Face
Rich:
The wear face is generally a quarterwave matchplate. This is an attempt to match impedance and provide a constructive interference on the forward moving pulse. I suggest you contact a local probe manufacturer for help selecting the best options which are usually boron silicates. Sigma transducers are located in Washington;
Kennewick, WA 99336
Phone: (509) 783-9497
Fax: (509) 783-9655
Email: info@sigmatx.com

Regards
Ed

----------- Start Original Message -----------
: We have designed a piece of ultrasonic equipment housing numerous (64) ultrasonic compression transducers. This equipment is exposed to a very harsh environment. Recently we have noticed that a lot of the transducer wear faces have been worn off, exposing a silver metallic material. The transducer continues to perform properly, however we are concerned with degradation of the signal quality if the silver metallic material were to become damaged. Could someone recommend a repair method (preferable some type of adhesive) which we can apply to the transducers front face? We have tried various types of epoxy, however this material tends to attenuate the signal below acceptable levels. Any recommendations would be greatly appreciated.
------------ End Original Message ------------





    
 
 
Doug Breeze
Director, Consultant; R&D
Inspection Software Limited, United Kingdom, Joined May 2000, 20

Doug Breeze

Director, Consultant; R&D
Inspection Software Limited,
United Kingdom,
Joined May 2000
20
02:17 Oct-03-2004
Re: Transducer Wear Face
Hi Rich,
Try three (or maybe four) wear pins located at the extremeties of the array or its holder, with a couplant gap of y/4 (in the couplant). This should eliminate abrasion, allow for minor contour changes, and with sufficient flow will give more consistent coupling.
Doug
---------- Start Original Message -----------
: We have designed a piece of ultrasonic equipment housing numerous (64) ultrasonic compression transducers. This equipment is exposed to a very harsh environment. Recently we have noticed that a lot of the transducer wear faces have been worn off, exposing a silver metallic material. The transducer continues to perform properly, however we are concerned with degradation of the signal quality if the silver metallic material were to become damaged. Could someone recommend a repair method (preferable some type of adhesive) which we can apply to the transducers front face? We have tried various types of epoxy, however this material tends to attenuate the signal below acceptable levels. Any recommendations would be greatly appreciated.
------------ End Original Message ------------




    
 
 

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