|About this Abstract
||Materials Science & Technology 2020
||Engineered Phase Transformations
||Phase Fraction Measurements in Textured Materials
||Adam Creuziger, Michael Cox, Kip Findley, Thomas Gnaupel-Herold, Whitney Poling, Chris Calhoun
|On-Site Speaker (Planned)
Many advanced high-strength steels rely on metastable austenite phase for improvements in strength and formability. Accounting for crystallographic texture in phase fraction measurements remains a challenge to current standards and practices. Several techniques have been proposed to provide accurate austenite phase fraction measurements in textured materials, such as averaging the intensity of several peaks and/or summation of intensity from several sample orientations.
This presentation will show the results of a series of numerical experiments that sought to quantify the effects of texture on the measurement of the austenite phase fraction, with an emphasis on techniques suitable for laboratory X-ray diffraction. The resulting phase fraction calculations showed that texture, the number of peak pairs and the sampling method have a drastic effect on phase fraction measurements, causing significant bias errors. Hexagonal grids produced minimal bias errors and demonstrated a robust method of measuring phase fractions in textured materials.