Ultrasonic Monitoring of Textures in Cold-Rolled Copper Sheets
The formation of deformation texture is an important material characteristic which influences the behavior of a material. A textured material usually exhibits certain levels of anisotropy which may or may not be desirable from a practical point of view. During a forming process, strip is progressively bent into complex shapes by passing it through a series of driven rolls or dies. Normally, punches and dies are designed so that successive stages in the forming of the part are carried out in the same die on each stroke of the press in a progressive forming method. However, total automation and the improvement of productivity and quality of the products is frustrated by the variability of the physical and mechanical properties of material feed stock. The directionalities of properties produced by rolling and other primary working processes can have important consequences on the fabricability of the material. For example, sometimes bending is more difficult when the bend line is parallel to the rolling direction than when the bend is made perpendicular to the rolling direction.
KeywordsShear Band Stack Fault Energy Ultrasonic Velocity Lamb Wave Rolling Texture
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