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Technical Discussions
Andre Lamarre
Andre Lamarre
02:38 May-28-1997
Aluminum heat-treating alloy

Is there an ultrasonic method to verify the quenching rate (or quenching quality) of aluminum heat-treating alloy.

Thank you

Andre Lamarre


 
 Reply 
 
Godfrey Hands
Consultant,
PRI Nadcap, United Kingdom, Joined Nov 1998, 307

Godfrey Hands

Consultant,
PRI Nadcap,
United Kingdom,
Joined Nov 1998
307
02:27 May-28-1997
Re: Aluminum heat-treating alloy
: Is there an ultrasonic method to verify the quenching rate (or quenching quality) of aluminum heat-treating alloy.

: Thank you

: Andre Lamarre

Dear Andre,
I think that there is a method, using a RESONANT ULTRASOUND SPECTROMETER
(RU Spec) marketed by Quatrosonics in the USA.
This instrument can measure Shear Modulus, Young's Modulus, Bulk Modulus,
Poisson's Ratio and the Density in one measurement, with an accuracy of not
less than 0.1% (according to their brochure).
I am sure that these measurements will give you the information that you
need.
If you need more information, please contact me.

Regards,

Godfrey Hands




 
 Reply 
 
David S Forsyth
David S Forsyth
02:16 May-28-1997
Re: Aluminum heat-treating alloy
: Is there an ultrasonic method to verify the quenching rate (or quenching quality) of aluminum heat-treating alloy.

: Thank you

: Andre Lamarre

We are currently researching ultrasonic methods of determining
condition of heat-damaged 7050 Al. Results will be shown at IEEE
Ultrasonics meeting in October in Toronto. There is some mechanical
testing and microstructure determination left to do, but results look
promising. If you contact me I would be happy to provide more info
and preprints when available.

Dave

**************
David S Forsyth
Institute for Aerospace Research
National Research Council Canada
tel 613-991-0693
fax 613-952-7136
email david.forsyth@nrc.ca
**************


 
 Reply 
 
Rolf Diederichs
Director,
NDT.net, Germany, Joined Nov 1998, 617

Rolf Diederichs

Director,
NDT.net,
Germany,
Joined Nov 1998
617
03:18 May-28-1997
Nondestructive Characterization of State and Properties of Aluminium Structures
: Is there an ultrasonic method to verify the quenching rate (or quenching quality) of aluminum heat-treating alloy.

: Thank you

: Andre Lamarre

Maybe the following article which will be published in the
next UTonline issue can point also to a solution for your problem.

Rolf Diederichs

Nondestructive Characterization of State and Properties of Aluminium Structures
Abstract

The contribution gives a short overview of IZFP investigations towards the process integrated characterization of microstructure and
evaluation of mechanical properties. The propagation velocities of ultrasonic waves allow the evaluation of the elastic constants of the
alloy and good correlations are found between the acousto-elastic constant of different alloys and their yield strengths. Using the
times-of-flight of different ultrasonic waves, the residual stress states in plates and welded parts are evaluated. The texture in Al-sheets
is determined and the earing parameter is characterized using measurements of ultrasonic times-of-flight as function of the ultrasonic
propagation direction. Ultrasonic backscattering technique is applied to visualize the distribution of ceramic reinforcements in
automotive pistons and conrods made of Al-based metal matrix composites. The volume content on reinforcement is evaluated from the
ultrasonic velocities. Backscattering and time-of-flight measurements are used to visualize and to characterize the burrs in Al- hollow
castings.

Eckhardt Schneider
Head of Department Process integrated Nondestructive Testing at
Fraunhofer Institut Zerstoerungsfreie Pruefverfahren IZFP,
University Bldg 37, D-66123 Saarbruecken
Phone: +49 681 302 3840
Fax: +49 681 39580
Email: eschneider@izfp.fhg.de


 
 Reply 
 
Paul McGreal
Paul McGreal
08:10 Jun-01-1997
Re: Aluminum heat-treating alloy
: Is there an ultrasonic method to verify the quenching rate (or quenching quality) of aluminum heat-treating alloy.

: Thank you

: Andre Lamarre

I am not sure if there is an Ultrasonic procedure to verify aluminum
"quenching". If by that you mean material hardness and/or proper heat
treatment of the aluminum, the method that I am familiar with is using Low
Frequency Eddy Current...60hz to find the proper material conductivity.
This can be translated from material charts from the manufacturer of the
aluminum. As I work in the Aerospace field on aircraft we use the Low
Frequency Eddy Current method to find if proper heat treatment has been
reached. And using the Aircraft manufacturer's spec's we determine it this
way. I apologize if this was off the subject by this is the method that I
am most familiar with.

Sincerely,

Paul McGreal
Minneapolis, Minnesota


 
 Reply 
 

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