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 -

964 views
Technical Discussions
Devendra Kumar
Devendra Kumar
03:09 Apr-09-2003
X ray of 9 % Ni welds

i am feeling a difficulty in getting required density in radiography of 9 % Ni material welds.
Can any one suggest me what parameter to be used for the same.

I tried with 280 Kv & 5 mA
Thichness - 10-25 mm

But i am getting a high density in HAZ & PM


 
 Reply 
 
DJ Kallhof
DJ Kallhof
06:46 Apr-09-2003
Re: X ray of 9 % Ni welds
: i am feeling a difficulty in getting required density in radiography of 9 % Ni material welds.
: Can any one suggest me what parameter to be used for the same.
.
: I tried with 280 Kv & 5 mA
: Thichness - 10-25 mm
:
: But i am getting a high density in HAZ & PM

Devendra,

I would suggest trying a faster film if you are able. The wider latitude may suffice in bring the densities close enough together for a single film technique. A multi film technique is another option. Filtering the beam is yet another option. I personally use 0.073" of aluminum to filter out the weaker end of the spectrum and cut back on scatter. Often times, cutting out the scatter and accenting the primary is all you need.


 
 Reply 
 
Fred Raco, Jr.
Consultant,
RNDT, Inc., USA, Joined Jul 2002, 24

Fred Raco, Jr.

Consultant,
RNDT, Inc.,
USA,
Joined Jul 2002
24
02:02 Apr-10-2003
Re: X ray of 9 % Ni welds
: i am feeling a difficulty in getting required density in radiography of 9 % Ni material welds.
: Can any one suggest me what parameter to be used for the same.
.
: I tried with 280 Kv & 5 mA
: Thichness - 10-25 mm
:
: But i am getting a high density in HAZ & PM

You may want to try using two different film speeds in the same cassette for each exposure. One film may cover the weld material and the other film may cover the HAZ & PM. This will require a penetrameter for the weld, the HAZ, and the PM.
Regards,
Fred Raco, Jr.
President - RNDT, Inc.
Johnstown, PA
.



 
 Reply 
 
James
James
06:16 Apr-14-2003
Re: X ray of 9 % Ni welds
: :


i am feeling a difficulty in getting required density in radiography of 9 % Ni material welds.
: : Can any one suggest me what parameter to be used for the same.
: .
: : I tried with 280 Kv & 5 mA
: : Thichness - 10-25 mm
: :
: : But i am getting a high density in HAZ & PM
.
: You may want to try using two different film speeds in the same cassette for each exposure. One film may cover the weld material and the other film may cover the HAZ & PM. This will require a penetrameter for the weld, the HAZ, and the PM.
: Regards,
: Fred Raco, Jr.
: President - RNDT, Inc.
: Johnstown, PA
: .
.
I think your penetrating power is much too high for that material thickness (1/2" - 1"), reduce the KV to 180.
James Ray
President
Worldspec


 
 Reply 
 
Mike
Mike
03:39 Apr-14-2003
Re: X ray of 9 % Ni welds
: : :
.
:
: i am feeling a difficulty in getting required density in radiography of 9 % Ni material welds.
: : : Can any one suggest me what parameter to be used for the same.
: : .
: : : I tried with 280 Kv & 5 mA
: : : Thichness - 10-25 mm
: : :
: : : But i am getting a high density in HAZ & PM
: .
: : You may want to try using two different film speeds in the same cassette for each exposure. One film may cover the weld material and the other film may cover the HAZ & PM. This will require a penetrameter for the weld, the HAZ, and the PM.
: : Regards,
: : Fred Raco, Jr.
: : President - RNDT, Inc.
: : Johnstown, PA
: : .
: .
: I think your penetrating power is much too high for that material thickness (1/2" - 1"), reduce the KV to 180.
: James Ray
: President
: Worldspec
.
Of course, the *President* of Worldspec would know that a reduced Kv would make the problem worse :-)

But seriously, if the problem is so bad, isn't the weld cap and/or root, too high/thick and not acceptable to specification?


 
 Reply 
 
DJ Kallhof
DJ Kallhof
04:39 Apr-16-2003
Re: X ray of 9 % Ni welds
: : : :
: .
: :
: : i am feeling a difficulty in getting required density in radiography of 9 % Ni material welds.
: : : : Can any one suggest me what parameter to be used for the same.
: : : .
: : : : I tried with 280 Kv & 5 mA
: : : : Thichness - 10-25 mm
: : : :
: : : : But i am getting a high density in HAZ & PM
: : .
: : : You may want to try using two different film speeds in the same cassette for each exposure. One film may cover the weld material and the other film may cover the HAZ & PM. This will require a penetrameter for the weld, the HAZ, and the PM.
: : : Regards,
: : : Fred Raco, Jr.
: : : President - RNDT, Inc.
: : : Johnstown, PA
: : : .
: : .
: : I think your penetrating power is much too high for that material thickness (1/2" - 1"), reduce the KV to 180.
: : James Ray
: : President
: : Worldspec
: .
: Of course, the *President* of Worldspec would know that a reduced Kv would make the problem worse :-)
.
: But seriously, if the problem is so bad, isn't the weld cap and/or root, too high/thick and not acceptable to specification?
.
Before this gets any worse lets find out something about the materials involved. A 9% Ni weld tells me nothing. What is the base metal? What is the filler wire? The AMS numbers may tell everything. One of the turbine cases I shoot is made of A-286, a specialty stainless with app. 25% Ni. The filler wire is an AMS 5786 with a 63% Ni content. With no build up the filler wire stands out like a sore thumb.


 
 Reply 
 

Product Spotlight

Echomac® PA Bar Tester

The Echomac® PA BT provides 100% inspection of round bars for core and surface defects, at speeds u
...
p to 2 m/sec, depending on the specific application. The unit allows producers to handle a much larger range of diameters in one installation, and is available in 3 models to test 10 – 75mm diameter (small model); 20 – 130mm (medium model) or 50 – 254mm (large model) bars.
>

Robotic laser shearography enables 100% inspection of complex, flight-critical composite structures

An article in “Composites World Magazine” showcases Non Destructive Testing of aero-structures
...
with Laser Shearography. Over the years Dantec Dynamics has supplied many solutions for the aerospace industry. Referring to specific customer projects several of these cases are examined to outline the advantages of using Laser Shearography for automated defect detection.
>

SITEX CPSERIES

Teledyne ICM’s CPSERIES has been designed with a view to revolutionizing the handling and perfor
...
mances of portable X-Ray sets. Despite having managed to halve the weight of similar portable X-Ray generators available on the market (while continuing to provide the same power output), the SITEX CPSERIES generators feature a shutter, a laser pointer, a beryllium window, an aluminum filter and two integrated diaphragms (customized sizes are available upon request). Without compromising the robustness and reliability for which ICM products are renowned, the small size and light weight of the SITEX CPSERIES will radically change the way that you perform your RT inspections. And you will see a positive impact in terms of both quality and return on investment (ROI).
>

AIS229 - Multipurpose Real Time System

Latest standard & automatic real time system developed by Balteau. The AIS229 has been designed to
...
do series inspection in a wide variety of industry. Composed of a shielded cabinet, 5 axis manipulator, x-ray generator and tubehead from 160kV to 225kV, a fl at panel & much more, the AIS229 is most certainly one of the most multipurpose RTR system available on the market.
>

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