Abstract
The problem of calculating the inverse pole figure (IPF) is analyzed from the perspective of the application of time-of flight (TOF) neutron diffraction to in-situ monitoring of the thermo-mechanical behavior of engineering materials. Based on a quasi-Monte Carlo (QMC) method, a consistent set of grain orientations is generated and used to compute the weighting factors for IPF normalization. The weighting factors are instrument dependent and were calculated for the engineering diffractometer, VULCAN, SNS-ORNL. The QMC method is applied to FCC structures, and can be easily extended to other crystallographic symmetries. Examples include 316LN stainless steel in-situ loaded in tension at RT, and an Al-2%Mg alloy, largely deformed by cold-rolling and in-situ annealed up to 380C.
