Monte Carlo Sampling for Microsegregation Measurements in Cast Structures

摘要

The statistical random meshing method used for the measurement of microsegregation in a cast microstructure was simulated using the Monte Carlo method. The standard deviation of measurements, the effect of sample size, the electron beam diameter, and the scattering on obtained solute partition coefficients were analyzed and evaluated. It is found that a sample size between 100 to 200 points can give satisfactory measurement. A method to use the measured segregation profiles in solid is suggested. Partition coefficients obtained by the statistical random sampling method are found to represent real segregation characteristics in the alloys.