Ultrasonic Measurement of the Earing Behavior of Aluminum Plate

Abstract

<p>Material processing such as rolling most certainly introduces a preferred orientation (or texture) in the material. This anisotropy in mechanical properties has an important effect on the fabricability of the metal. For example, when drawing a cylindrical metal sheet, ears are formed around the top edge of the drawn sheet as shown in Fig. 1. These ears result from the sheet metal being stronger in one direction than in other directions in the plane of the sheet. This is also referred to as planar anisotropy which causes different deformations in various directions. In order to assure the quality of the product and to improve the manufacturing process, an effective way of measuring crystallographic texture has been sought for decades.</p>