triple junctions on merged grains

[kilir]

Hi Ralf, triple junction on grains work fine, however, when I merge these grains to get rid of twin boundaries, triple junctions on merged grains still returns junctions that include twin boundaries.

% calcgrains
[grainsl ebsdc.grainId] = calcGrains(ebsdc,'angle',10*degree);

% get tp points
tp = grainsl('q').triplePoints('q','q','q');

figure
plot(grainsl('q'))
hold on
plot(tp,'MarkerSize',8,'MarkerFaceColor','k')
hold off
% looks good 

% but we don't want to include twin boundaries  - merge dauphine
gb_qtz = grainsl.boundary('Quartz','Quartz');
rot1 = rotation('axis',Miller(0,0,0,1,CS{2}),'angle',60*degree);
ind1 = angle(gb_qtz('Quartz','Quartz').misorientation,rot1)<6*degree; 
twinBoundary = gb_qtz(ind1);
[grains_mergedc,parentID_grains]= merge(grainsl,twinBoundary);
ebsd_mergedc = ebsdc;
ebsd_mergedc.grainId  = parentID_grains(ebsdc.grainId);

% get tp points
clear tp
tp = grains_mergedc('q').triplePoints('q','q','q');

% there are triple junction along boundaries
figure
plot(grains_mergedc('q'))
hold on
plot(tp,'MarkerSize',8,'MarkerFaceColor','k')
hold off

% seems that triple junctions still relay on the original grain boundary?
figure
plot(grains_mergedc('q'))
hold on
plot(twinBoundary,'lineColor','r','linewidth',2)
hold on
plot(tp,'MarkerSize',8,'MarkerFaceColor','k')
hold off

There are triple junctions indicated where none should be.

It looks like the old twin boundaries are still considered, despite grains are merged.

Did I miss something or do I have an error in the script above? Or do I have to implicitly exclude/delete triple junctions that belong to a twin boundary?

All the best, Rüdiger

[ralfHielscher]

Hi Rüdiger,

thank you for reporting this. It will be fixed in the next minor release.

Ralf.