Ultrasonic Technique for the Study of Solid-Liquid Interface in Metallic Alloys

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Abstract
We have developed a new ultrasonic technique which realizes the in site or “real time” observation of the solid-liquid interface (SLI) in metallic alloys. In this technique, the location and velocity of the SLI can be determined from the transit time measurements of the echo from the SLI. The roughness of the interface can also be determined from amplitude measurements of the echo. This technique has been successfully applied to the observation of directional solidification in tinalloys.

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