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 -
675 views
Technical Discussions
gulay litchfield
gulay litchfield
06:32 Jul-22-2003
Crack detection

Dear All
We are producing punches and dies for the tabletting machines (presses) in the pharmaceutical industry. Currently, we have been sourcing a crack detection equipment (for very fine cracks) for surface and sub-surface cracks.Eventhough we have liquid penetrant and optical measurement equipment in place, these methods are time consuming eventhough very effective. The ideal method should detect the cracks within less than a minute. Our products are made of steel and average material thickness is 16 mm. If you suggest any method or equipment which allows us perform the test in less than a minute and also precise, this would be highly appreciated.
Meanwhile, we tried Eddy current method and this did not give the expectant results, was not effective. For more information about our products, you can visit our web site.
www.iholland.co.uk
Could Magnetic Particle-Fluorescent, Ultrasonic test or Magnetic Barkhausen Noise method be the answer?
Thank you in advance





 
 Reply 
 
John O'Brien
Consultant, -
Chevron ETC , USA, Joined Jan 2000, 280

John O'Brien

Consultant, -
Chevron ETC ,
USA,
Joined Jan 2000
280
09:56 Jul-24-2003
Re: Crack detection
You might consider resistivity measurement. 4 point pin resisitivity measures very fine chganges in measurement resistance over a set pin spacing. Changes in resisitivity due to prescence of a crack are possible. Once set up properly it is less than a minute per spot. If you wish to pursue please contact me.


 
 Reply 
 
Jamie Gauthier
Jamie Gauthier
06:07 Jul-24-2003
Re: Crack detection
You might consider ACFM (Alternating Current Field Measurement). Very accurate and fast for measuring surface breaking cracks. Can work in high temperatures as well and gives a recordable image.


 
 Reply 
 
abdallah hassan
abdallah hassan
05:35 Aug-04-2003
Re: Crack detection
: You might consider resistivity measurement. 4 point pin resisitivity measures very fine chganges in measurement resistance over a set pin spacing. Changes in resisitivity due to prescence of a crack are possible. Once set up properly it is less than a minute per spot. If you wish to pursue please contact me.
.plz reply quickly either refuse or accept




 
 Reply 
 

Product Spotlight

Eddy Current inspection : RotoETscan Rotating Head

The rotating head RotoETscan detects the presence of longitudinal surface or sub surface defects a
...
t high speed. The rotating head is often installed directly on the production line. It is generally dedicated to the control of long products such as tubes, bars and wires, made of ferrous or non-ferrous material. It can also be used for inspection of small parts (billets).
>

EKOSCAN Phased Array

In order to always fit your needs, EKOSCAN can manufacture any type of UT transducer, either convent
...
ional or Phased Array. As an ISO 9001: 2015 certified company, EKOSCAN is extremely careful as far a material selection and manufacturing processes are concerned. Our probes guarantee our customers the benefits of latest innovations regarding piezo-composite, backing, impedance adaptation layer, etc. Specific probes for hostile environment: high temperature, high pressure, corrosive environment,etc. Specific probes designed to fit your specific application: optimization of every parameter to guarantee you the best detection.
>

IntraPhase Athena Phased Array System

The Athena Phased Array system, manufactured by WesDyne NDE Products & Technology, consists of a pha
...
sed array acquisition system and PC running IntraSpect software. A PC is used to perform acquisition, analysis and storage of the data. System hardware is capable of operating up to four data sets with any combination of phased array or conventional UT probes. NOW AVAILABLE IN 64-64 CONFIGURATION.
>

Silverwing RMS PA - Phased-array corrosion mapping

Eddyfi Technologies integrated two market leading solutions, Silverwing’s RMS and M2M’s instru
...
ments to provide a high-speed, remote access ultrasonic phased-array inspection system with live total focusing method (TFM).
>

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