Ultrasonic Monitoring of Recrystallization Textures in Aluminum

The present paper is an attempt to use ultrasonic velocity measurements to characterize the texture of an aluminum-magnesium alloy (Al 5xxx) and to compare the results with orientation imaging microscopy (OIM) results. The results are characterized in terms of three orientation distribution coefficients (ODC’s), W400, W420, and W440, each of which describes a particular forming anisotropy, and each of which has significant impact on the final products

Application of a Fourier Transform-Phase-Slope Technique to the Design of an Instrument for the Ultrasonic Measurement of Texture and Stress

This paper describes the development of an ultrasonic instrument to measure texture (preferred grain orientation), stress, and related physical properties in metal sheets in industrial environments. The technique is based on precise measurements of the speed of guided modes, including angular variations, and is made practical by the use of EMAT transducers, which require no couplant. The instrument is expected to find important initial applications in predicting sheet metal formability, either as a process control tool in the rolling mill or as a quality control tool in a stamping shop. Since the instrument will offer an improved measurement capability not presently available to industry, a much broader range of applications may develop, including measurements of stress and porosity in sheet and other simple geometries.</p

Ultrasonic Predictions of Plastic Strain Ratios in Steel Sheet

Control of texture (preferred crystallographic orientation) is an important step in ensuring that steel sheet has the desired characteristics in deep drawing operations. Traditionally, texture is measured by x-ray or neutron diffraction techniques. However, despite obtaining the most complete information, the latter require very specialized capital facilities and the former involve radiation hazards and sense only a very thin surface layer. Hence, there has been considerable interest in developing alternative techniques, suitable for field use, which provide volumetrically averaged information.</p

On greedy tetrahedralization of points in 3D

Control of texture (preferred crystallographic orientation) is an important step in ensuring that steel sheet has the desired characteristics in deep drawing operations. Traditionally, texture is measured by x-ray or neutron diffraction techniques. However, despite obtaining the most complete information, the latter require very specialized capital facilities and the former involve radiation hazards and sense only a very thin surface layer. Hence, there has been considerable interest in developing alternative techniques, suitable for field use, which provide volumetrically averaged information