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Nondestructive Characterization of State and Properties of Aluminium Structures

Posted by: Rolf Diederichs , E-mail: rd@ultrasonic.de, on May 28, 1997 at 23:18:11:

In Reply to: Aluminum heat-treating alloy posted by : Andre Lamarre on May 28, 1997 at 02:38:49:

: 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

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Comments:
: : 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

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