william
Hello,
I am analyzing an in situ process (synchrotron radiation data) from a deformed steel alloy in TOPAS V4.2 (Launch mode). The material only contains two phases (austenite and ferrite).
My results from Rietveld refinements always return the maximum value of crystallite size (1999 nm) for the parameters (CS_L and CS_G) for all process steps and for both phases (austenite + ferrite). Another results like phase contents, microstrains and lattice parameter make sense. The calibration process with LaB6 and the wavelength are correct.
I have reviewed the TOPAS macro with another people but we were not able to figure out what was the problem.
If possible, I would like to send the TOPAS macro and the data (.xy) by e-mail for a better evaluation.
Best regards
William
alancoelho
The larger the values the smaller the effects. In other words large crystals result in small peak broadening and large errors in the crystallite size.
rowlesmr
It just shows that the broadening of the peaks is dominated by microstrain, not crystallite size. In this case, the crystallite size becomes very large, indicating that there is very little broadening.
william
Thanks Alan and rowlesmr!
Regards
William