Materials Science Forum Vols. 495-497

Abstract: The mathematical method of the texture function restoration according to diffraction experiment is offered. The texture function is represented as superposition of standard texture functions with the identical dispersions, located on a regular three-dimensional grid in orientation space. Applicability of the method is shown by model examples and in an example of a cold rolled texture of a copper sheet.

Abstract: The objective of the present work is to study of errors on measured pole figures of hexagonal materials. We used neutron time-of-flight (TOF) technique for texture measurements and obtained spectra for estimating of error values of measured pole figures. Peak profile analysis of an each individual spectrum allows gain pole figure value itself and the corresponding error at each pole figure point as well. Such results could be obtained for measurements on stationary source of radiation with the usage of a position sensitive detector.

Abstract: The texture index F2 (1£ < F2 £ ¥ , F2 = 1 – random distribution) is up to now the only parameter used in a global way to characterize the degree of anisotropy of a given ODF – the foremost question to be answered in applied TA. However, one number is a quite poor characteristic, and a concrete F2-value can hardly be interpreted. It depends on many parameters and may belong to very different orientation distributions. Introducing so-called ODF-channels a one-dimensional ODFchannel histogram can be got for any ODF. Its form and spectral properties provide a comprehensive characterization of the character of anisotropy of a given ODF.

Abstract: The textures of oxide scales grown on low carbon steel in air over the temperature range 850-950°C were investigated. The low carbon steel was oxidized with the air velocity of 4.2 cm/s for 10 s in order to approximate the formation of tertiary scales in hot rolling. At 850°C, the wüstite texture and magnetite texture are weak with no dominant components. For the temperatures of 900 and 950°C, the wüstite and magnetite phases have a cube texture {001}<100>. The experimental results indicate that during hot rolling in the g region, the texture of the oxide scale is cubic and when rolling in the a region, the texture of the oxide scale is weak with no dominant components.