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 >
Maximum penetration of Ir-192 in steel
Career Discussions
Job Offers
Job Seeks
Classified Ads
About NDT.net
Articles & News

1863 views
06:51 Nov-14-2008
Pengzhu Wang
Maximum penetration of Ir-192 in steel

Hi,
We are using Ir-192 to examine the casting quality of a steel part with maximum thickness 95.25mm:
(1) Is Ir-192 OK for this application?
(2) Does the decay influence the maximum penetration thickness?
Many thanks,
Pengzhu



 
07:11 Nov-14-2008
tj
Re: Maximum penetration of Ir-192 in steel ----------- Start Original Message -----------
: Hi,
: We are using Ir-192 to examine the casting quality of a steel part with maximum thickness 95.25mm:
: (1) Is Ir-192 OK for this application?
: (2) Does the decay influence the maximum penetration thickness?
: Many thanks,
: Pengzhu
------------ End Original Message ------------

This would be working at the upper practical limit of Ir192. The energy levels would remain the same with decay. However, with loss of activity comes increased shot time and at 3in. of steel it would be impractical for normal use. Better to use higher energy x-ray or cobalt60 gamma.


 
09:53 Nov-14-2008

Juan Amado

Engineering, Inspection
Arco Industrial, S.A.,
Panama,
Joined Nov 2001
44
Re: Maximum penetration of Ir-192 in steel ----------- Start Original Message -----------
: : Hi,
: : We are using Ir-192 to examine the casting quality of a steel part with maximum thickness 95.25mm:
: : (1) Is Ir-192 OK for this application?
: : (2) Does the decay influence the maximum penetration thickness?
: : Many thanks,
: : Pengzhu
: This would be working at the upper practical limit of Ir192. The energy levels would remain the same with decay. However, with loss of activity comes increased shot time and at 3in. of steel it would be impractical for normal use. Better to use higher energy x-ray or cobalt60 gamma.
------------ End Original Message ------------


If 95mm is the maximum thickness, but you have thinner sections, you could probably gain valuable information about the part using Ir192, however, if you are looking to get a good density reading at the thickest portion of the casting you probably will not get it with this source.
Hope this helps, regards,
Juan Amado



 
09:53 Nov-16-2008
Peter Alfers
Re: Maximum penetration of Ir-192 in steel you can use Ir 192 in conjunction with two Films how will
exposure at once. Than you need the half time for your right density .For the interpretation use the films lying upon each other.


 


© 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|