When determining twin boundaries (e.g., CSL 3), does/can MTEX consider not just a tolerance about the angle but also about the axis?

[StopkaKris]

Hello,

This question has to do with another question I posted here a while ago: #1452

I am interested in determining sigma 3 twin boundaries in FCC materials. To do this, I use a mix of MTEX and DREAM.3D. DREAM.3D can determine twin boundaries in 2D and 3D digital microstructures and allows the user to set a tolerance for what it should consider a sigma 3/CSL 3 boundary.

In MTEX, the line below will determine the percent of twin boundaries with tolerance of 1 degree.

CSL_3_GB_percentage = 100 * volume(gB.misorientation,CSL(3,ebsd.CS),1*degree);

In DREAM.3D, the Merge Twins filter allows the user to specify not just the angle tolerance but also the axis tolerance. From the DREAM.3D documentation:

The user can specify a tolerance on both the axis and the angle that defines the twin relationship (i.e., a tolerance of 1 degree for both tolerances would allow the neighboring Features to be grouped if their misorientation was between 59-61 degrees about an axis within 1 degree of <111>, since the Sigma 3 twin relationship is 60 degrees about <111>).

Does/can MTEX consider not just a tolerance on the angle but also on the axis about which the misorientation is computed?

Best regards,
Kris

Krzysztof Stopka

[kilir]

Hi,
the angle threshold in mtex relares to the angle between the measured misorientation and the ideal csl3 misorientation. It is not only axis or only angle.
Cheers,
Rüdiger

[StopkaKris]

Hi Rüdiger,

Thank you for your quick reply!

Best regards,
Kris

Krzysztof Stopka