where expertise comes together - since 1996 -

The Largest Open Access Portal of Nondestructive Testing (NDT)

Conference Proceedings, Articles, News, Exhibition, Forum, Network and more

where expertise comes together
- since 1996 -

593 views
Technical Discussions
samoen
Consultant, -
NDT Wide, France, Joined Jun 2007, 4

samoen

Consultant, -
NDT Wide,
France,
Joined Jun 2007
4
02:44 Jun-28-2007
bond testing

We would like to test epoxy bounding quality. Do you have an idea about the use of Ultrasonic Phased Array Technology (or other NDT technology) for bond testing and/or bonding strength evaluation.

Regards



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

Tom Nelligan

Engineering,
retired,
USA,
Joined Nov 1998
390
05:08 Jun-28-2007
Re: bond testing
What materials are you bonding? Metal, composites, or ceramics? If you are looking at composite bonds, then either conventional or phased array ultrasonic equipment can be used to check presence or absence of bonding. If you are looking at epoxy bonded metal or plastic, the best approach is usually to look at the ringdown envelope from a single element delay line transducer, as described in the attached link. The reason for this is the significant acoustic impedance mismatch between metals or ceramics and epoxies, which leads to large reflections from the bondline even when there is a good bond. The change in amplitude of a single peak between bond and disbond conditions is small, but the change over an envelope of five or six multiples is readily visible. Phased array systems generally do not have the capability of analyzing the slope of a ringdown envelope, so a conventional flaw detector with an appropriate delay line transducer is a good choice.

Amplitude-based ultrasonic tests generally qualify the presence or absence of bonding only, not bonding strength.



    
 
 Reply 
 

Product Spotlight

High-performance Linear Phased Array Probes

Available to order from stock in a range of 5MHz – 7.5MHz and from 16 to 64 elements. Designed w
...
ith piezo-composite elements, Phoenix phased array probes provide high-resolution imaging to maximise sensitivity; accurate ultrasonic detection and sizing of defects in welds; and effective corrosion mapping. Housed in a rugged stainless steel case for on-site industrial NDT applications.
>

MUSE Mobile Ultrasonic Equipment

The MUSE, a portable ultrasonic imaging system, was developed for in-field inspections of light-weig
...
ht structures. The MUSE consists of a motor-driven manipulator, a water circulation system for the acoustic coupling and a portable ultrasonic flaw detector (USPC 3010). The MUSE provides images of internal defects (A-, B-,C- and D-scan).
>

Wireless TOFD scanner

Quick, accurate and highly reproducible welds testing. The System operates wirelessly and is compat
...
ible with any type of Windows based Laptop, Desktop or Tablet.
>

Ultrasonic Squirter/Gantry System

TecScan’s NDT Ultrasonic Gantry Systems are industrial Squirter scanners designed for non-destru
...
ctive quality testing and raster scanning of large structures and parts. The Gantry Systems are usually composed of an Industrial Mechanical Scanner and a Control Room with System Workstation.
>

Share...
We use technical and analytics cookies to ensure that we will give you the best experience of our website - More Info
Accept
top
this is debug window