On-Line Texture Monitoring of Steel Sheets
Ultrasonic velocities reveal anisotropy in polycrystalline metals. They change with the propagation and polarization directions relative to the rolling and normal directions, in case of a rolled plate, showing an orthorhombic symmetry. The magnitude of the anisotropy is usually small and the fractional velocity differences are observed on the order of 10-2 at most. But, it is large enough to obscure the acoustoelastic effect, which refers to the ultrasonic-velocity changes and their anisotropy caused by stress, and is capable of measuring residual stress nondestructively (Chapter 10). One of major subjects of acoustoelastic studies has been the separation of the stressinduced anisotropy from the intrinsic anisotropy.
KeywordsSteel Sheet Ultrasonic Velocity Elastic Anisotropy Plastic Anisotropy Rolling Plane
Unable to display preview. Download preview PDF.