Uncertainty in retained austenite measurements applied to individual crystallographic orientations

[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.

[发布机构] 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

[效力级别] 物理学 [学科分类] 材料科学（综合）

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