Issue with an XRD texture of an Al alloy rolled sheet

[MartinL75]

Hi Ralph and everybody.
Connected with #2111 issue, I found a similar problem regarding the ODF reconstruction from raw pole figures measured by a Philips X'Pert diffractometer. However, in this case I could not solve it by normalizing the corrected PFs, as we can see below.
Here are the raw PFs:

Now the corrected ones (same method as mentioned in #2111):

Then normalizing:

And the PFs reconstructed from the ODFs are these:

It appears that the central high intensity of the (111) and (220) poles are unreal.
Moreover, if we calculate the ODF just from the corrected PFs (not normalized), we have:

which also seems strange.

I'm attaching the rw1 files and the script in a zip file. MTEX version is 5.1.1 running with Matlab R20117b.
Al_6061_T4.zip

Thanks a lot in advance for helping.
Regards,

Martín Leonard
IFIR-CONICET/UNR
Rosario, Argentina.

[ralfHielscher]

Hi Martin,

sorry for the delay. I was able to produce this one

the main thing I changed, was to remove the outer rings of the XRD measurements as they are too heavily effect by defocusing, i.e.

pfc(pfc.r.theta >= 70*degree) = [];

I uploaded this example to https://mtex-toolbox.github.io/ExAlODFReconstruction.html

PS: I made some more minor changes to the ODF reconstructor and PoleFigure object. Therefore, you will not be able to run the code unless you checkout the current developer branch of MTEX from Github. Nevertheless I would be grateful, if you could add some explanations to the site about the material, the measurement process, etc. You can edit this file here https://github.com/mtex-toolbox/examples/blob/master/ExODFReconstruction/ExAlODFReconstruction.m

All then best,
Ralf.

[ralfHielscher]

Sorry, the link should be working right now. I forgot to push.
Ralf.

[MartinL75]

I've just added some comments about experimental data. Please let me know if it works OK (it's my first contribution) and also if you think that I should add some more details.
Regards

[ralfHielscher]

Hi Martin,
I can not see you edits. You should proceed as described here and generate a pull request. You may also send me the changes by mail.
Thank you a lot.
Ralf

[MartinL75]

I think the pull request was succesfully generated now. Thanks

[ralfHielscher]

Yes I merged it. I will take a while to be visible on the example page.
Thanks a lot.
Ralf.