Texture Measurement of Sheet Metals

As sheet metal is manufactured, usually by rolling from slab, the processes that it undergoes impart anisotropic crystallographic texture: net crystallographic orientation to the polycrystalline metal sheet. Along with other parameters, texture has an effect on the formability of the metal which determines its suitability for various further manufacturing processes. Previously, determination of this metallurgical texture has been performed by X-ray pole figure analysis, and now increasingly by electron backscattered diffraction (EBSD). These processes typically take several hours, and involve the removal of sample sections of the metal.

By using an ultrasonic technique based on Lamb waves, we can measure the anisotropy of a sheet of metal in less than half a minute at maximum speed. The use of non-contact EMAT transducers also allows the on-line installation of texture measurement systems.

Sonemat has developed a fully integrated, automatic ultrasonic texture measurement system, the TE-06. Small enough to fit in the boot of a car, this system allows rapid, non-contact, non-destructive measurement of the key orientation distribution coefficients (ODCs) that describe the crystallographic texture of metal strip.

Ultrasonic Texture Measurement Advantages:

The TE100:

The TE100
Examples of our data and software interface:

Simple acquisition, simulation of pole figures from ultrasound data.

Simple acquisition, simulation of pole figures from ultrasound data. Example 1
Simple acquisition, simulation of pole figures from ultrasound data. Example 2.
The science behind ultrasonic texture measurement
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Detailed specification - Texture Measurement of Sheet Metals