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 -

AT-Automation Technology GmbH
AT -Automation Technology is a systems house for industrial image processing. AT offers thermographic ndt systems as well as high-speed 3D sensors.

955 views
Technical Discussions
Ron Olson
R & D, Aerospace
The Best Aviation Company In The World, USA, Joined Feb 2005, 23

Ron Olson

R & D, Aerospace
The Best Aviation Company In The World,
USA,
Joined Feb 2005
23
04:52 Sep-29-2005
Metals and Conductivity

Can an unknown aluminum alloy be strictly determined by conductivity? Thank you.


    
 
 
Joe Buckley
Consultant, ASNT L-III, Honorary Secretary of BINDT
Level X NDT, BINDT, United Kingdom, Joined Oct 1999, 519

Joe Buckley

Consultant, ASNT L-III, Honorary Secretary of BINDT
Level X NDT, BINDT,
United Kingdom,
Joined Oct 1999
519
00:42 Oct-01-2005
Re: Metals and Conductivity
Simple answer: No
Typically Aluminium Alloys cover quite a range of conductivity depending on Heat treatment state.

The relationship between heat treatment and conductivity is complex: Many alloys (e.g. the common 7075 type) follow a circular curve with heat treatment/work - Even knowing the alloy composition you cannot reliably tell the full state from conductivity - often need hardness as well.

What you can do is use conductivity as a check- If an alloy has the conductivity you expect it is 'likely to be correct', or more precisely, if it is different something is wrong, but you cant work back to deduce much, with a high degree of certainty, if you only know conductivity.

If you can make a few more assumptions it becomes a lot more useful. Typically a shop may only work with a few different alloys, so conductivity can be used to check which one you have.

If you 'know nothing' you need hardness and PMI checks as well

Joe


----------- Start Original Message -----------
: Can an unknown aluminum alloy be strictly determined by conductivity? Thank you.
------------ End Original Message ------------




    
 
 
Carl Berrojo
Carl Berrojo
05:32 Oct-02-2005
Re: Metals and Conductivity
----------- Start Original Message -----------
: Can an unknown aluminum alloy be strictly determined by conductivity? Thank you.
------------ End Original Message ------------
No, due to the overlapping conductivity values of aluminum alloys (ie. 2024-T3 is 28%-32% IACS and 7075-T6 is 30%-35% IACS). Normally, you would identify the alloy with acid testing (we use kits provided for this purpose by Scientific Systems Laboratories), then use the conductivity value to determine the temper (heat treat condition).





    
 
 
S.V.Swamy
Engineering, - Material Testing Inspection & Quality Control
Retired from Nuclear Fuel Complex , India, Joined Feb 2001, 785

S.V.Swamy

Engineering, - Material Testing Inspection & Quality Control
Retired from Nuclear Fuel Complex ,
India,
Joined Feb 2001
785
02:13 Oct-02-2005
Re: Metals and Conductivity
Dear Ron,

No. The conductivity is just one of several parameters. You will need a spectro or XRF spot analysis, if you don't want to cut a piece and send it for conventional chemical analysis. Strength and hardness data will tell you about heat treatment.

Swamy

----------- Start Original Message -----------
: Can an unknown aluminum alloy be strictly determined by conductivity? Thank you.
------------ End Original Message ------------




    
 
 

Product Spotlight

Alpha Pro Digital Radiography System

The Alpha Pro digital X-ray system is the ideal system for your NDT \r\nneeds, as it offers amazin
...
g 16 bit images which enable the highest \r\nlevel of detection and identification of hairline cracks. While weighing only 3kg (6.6lbs), this panel has the largest imaging area: 35 X 43 cm (14X17 in).
>

I&T Nardoni

NDT, RESEARCH AND DEVELOPMENT OF NEW METHODOLOGY, TRAINING CENTER I&T NARDON INSTITUTE was idiated
...
in 1988 by Giuseppe Nardoni, now president and owner of the company, based on his multi-annual and international experience in the field of NDT.
>

Semi-Automated Phased Array Immersion System for Small Composite Parts

Turn-key semi-automated system as an improved and affordable solution for inspection of small comp
...
osite parts. Includes support table, immersion tank, scanner, PA instrument, PC, Analysis software, database, wedge management and other options.
>

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