Uncertainty in retained austenite measurements applied to individual crystallographic orientations

17th International Conference on Textures of Materials

材料科学;物理学

Creuziger, A.^1 ; Gnäupel-Herold, T.^2

Materials Science and Engineering Division, National Institute of Standards and Technology (NIST), Gaithersburg

MD

20899, United States^1

NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg

MD, United States^2

关键词: Crystallographic orientations;    Monte Carlo techniques;    Orientation distribution function;    Phase fractions;    Phase volume fraction;    Pole figure;    Retained austenite;    Transformation induced plasticity steel;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/82/1/012066/pdf
DOI  :  10.1088/1757-899X/82/1/012066

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

A technique to measure the phase volume fraction of an individual orientation and the uncertainty in the measurement is demonstrated in this paper. The technique of complete pole figure averaging using neutron diffraction was used to assess the phase fraction of retained austenite in transformation induced plasticity (TRIP) steels and quantify the uncertainty in the phase fraction. In parallel, an ensemble of orientation distribution functions was calculated to assess crystallographic volume fractions of particular orientations and the uncertainty of these volume fractions using Monte Carlo techniques. These methods were combined to measure the retained austenite phase volume fraction of an individual orientation.