-
Notifications
You must be signed in to change notification settings - Fork 7
/
ORTools_example01.m
178 lines (164 loc) · 7.37 KB
/
ORTools_example01.m
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
% *********************************************************************
% ORTools - Example 1
% *********************************************************************
% Reconstructing the prior austenite microstructure from lath martensite
% with the variant graph approach
% The MTEX description for reconstruction is given here:
% https://mtex-toolbox.github.io/GrainGraphBasedReconstruction.html
% https://www.youtube.com/watch?v=AcR-nXg5QKo
% *********************************************************************
% Dr. Azdiar Gazder, 2020, azdiaratuowdotedudotau
% Dr. Frank Niessen, 2020, contactatfniessendotcom
% (Remove "dot" and "at" to make this email address valid)
% *********************************************************************
home; close all; clear variables;
currentFolder;
set(0,'DefaultFigureWindowStyle','normal');
screenPrint('StartUp','ORTools - Example 1');
%% Initialize MTEX
% Startup and set some settings
startup_mtex;
setMTEXpref('xAxisDirection','east');
setMTEXpref('zAxisDirection','outOfPlane');
setMTEXpref('FontSize',14);
setInterp2Tex;
% Default directories - Do not modify
Ini.dataPath = [strrep(pwd,'\','/'),'/data/'];
Ini.cifPath = [Ini.dataPath,'input/cif/'];
Ini.ebsdPath = [Ini.dataPath,'input/ebsd/'];
Ini.texturePath = [Ini.dataPath,'output/texture/'];
Ini.imagePath = [Ini.dataPath,'output/images/'];
%% Load data
% Load an MTEX dataset into 'ebsd'
mtexDataset = 'martensite';
screenPrint('SegmentStart',sprintf('Loading MTEX example data ''%s''',mtexDataset));
ebsd = mtexdata(mtexDataset);
%% Compute, filter and smooth grains
screenPrint('SegmentStart','Computing, filtering and smoothing grains');
% Grains are calculated with a 3° threshold
[grains,ebsd.grainId] = calcGrains(ebsd('indexed'),'angle',3*degree);
% EBSD data in small grains are removed
ebsd(grains(grains.grainSize < 3)) = [];
% Recalculate the grains from the remaining data ...
[grains,ebsd.grainId] = calcGrains(ebsd('indexed'),'angle',3*degree);
% ... and smooth the grain boundaries
grains = smooth(grains,5);
%% Rename and recolor phases
screenPrint('SegmentStart','Renaming and recoloring phases');
phaseNames = {'Gamma','AlphaP'};
% Rename 'Iron bcc (old)'to 'AlphaP' and 'Iron fcc' to 'Gamma'
ebsd = renamePhases(ebsd,phaseNames);
% Choose your favourite colors
ebsd = recolorPhases(ebsd);
%% Define and refine parent-to-child orientation relationship
screenPrint('SegmentStart','Define and refine parent-to-child OR');
% Define 'Gamma" as the parent and 'AlphaP' as the child phase
job = setParentGrainReconstructor(ebsd,grains,Ini.cifPath);
% Give an initial guess for the OR: Kurdjumov-Sachs ...
job.p2c = orientation.KurdjumovSachs(job.csParent, job.csChild);
% ... and refine it based on the fit with boundary misorientations
job.calcParent2Child;
% Let us check the disorientation and compare it with K-S and N-W
% (The disorientation is the misfit between the grain misorientations
% and the misorientation of the OR)
KS = orientation.KurdjumovSachs(job.csParent,job.csChild);
NW = orientation.NishiyamaWassermann(job.csParent,job.csChild);
plotHist_OR_misfit(job,[KS,NW],'legend',{'K-S OR','N-W OR'});
% Display information about the OR
ORinfo(job.p2c);
% - There are 24 martensitic variants
% - And a ~2.4° disorientation exists from the Nishiyama-Wassermann OR
%% Plotting (with ORTools functions)
screenPrint('SegmentStart','Plotting some ORTools maps');
% Use some of the ORTools functions to visualize the determined OR
% and its relation to the microstructure
% Phase map
plotMap_phases(job,'linewidth',2);
% - There is no retained austenite (gamma)
% Parent and child IPF maps
plotMap_IPF_p2c(job,vector3d.Z,'linewidth',2);
% - It is clear that martensite has formed from multiple prior
% - austenite grains and that some surface scratches led to bad indexing
% Child-child grain boundary misorientation map
plotMap_gB_c2c(job,'linewidth',2);
% - Misorientation angles of ~15-50° are not present within prior
% austenite grains and thus delinitate prior austenite grain
% boundaries
% Plot a map of the OR boundary disorientation, or misfit
plotMap_gB_misfit(job,'linewidth',2, 'maxColor',5);
% - By setting a threshold at 5 degrees, the prior austenite grain
% boundaries are identified by their large misfit with the OR
% Plot a map of the OR boundary probability
plotMap_gB_prob(job,'threshold',2.5*degree,'tolerance',2.5*degree,'linewidth',2);
% - the same can be visualized by calculating the probability that a
% boundary belongs to the OR
%% Reconstruct parent microstructure
% - Reconstruct the microstructure with a graph-based approach
job.calcGraph('threshold',2.5*degree,'tolerance',2.5*degree);
job.clusterGraph('inflationPower',1.6)
% Plot the clusters ...
plotMap_clusters(job,'linewidth',2);
% ... and calculate the parent orientations
job.calcParentFromGraph
% Plot the reconstructed parent microstructure
figure;
plot(job.parentGrains,job.parentGrains.meanOrientation,'linewidth',2);
%% Remove badly reconstructed clusters
% While the first reconstruction looks good, plotting the fit of each
% reconstructed alphaP grain with the overall parernt orientation of the
% cluster shows that some grains are not well-reconstructed
figure;
plot(job.grains,job.grains.fit./degree,'linewidth',2);
setColorRange([0,5]);
mtexColorbar;
% Therefore, the reconstructed grains with bad fits or very small clusters
% are reverted
job.revert(job.grains.fit > 5*degree | job.grains.clusterSize < 15)
% Plot the remaining grains
figure;
plot(job.parentGrains,job.parentGrains.meanOrientation,'linewidth',2)
%% Fill in unreconstructed regions with voting algorithm
% Use the already confidently reconstructed gamma grains to vote for the
% gamma orientation of the yet-to-be reconstructed alpha grains
% Iterate this 5 times ...
for k = 1:3
% compute votes
job.calcGBVotes('p2c','threshold',k*2.5*degree);
% compute parent orientations from votes
job.calcParentFromVote
end
%... and plot the optimized reconstructed parent microstructure
figure;
plot(job.parentGrains,job.parentGrains.meanOrientation,'linewidth',2)
%% Clean reconstructed grains
% Now clean the grains by:
% - merging grains with similar orientation
job.mergeSimilar('threshold',7.5*degree);
% - and merging small inclusions into larger grains
job.mergeInclusions('maxSize',50);
% This is the cleaned reconstructed parent microstructure
figure;
plot(job.parentGrains,job.parentGrains.meanOrientation,'linewidth',2)
%% Variant analysis
% Now that both the alpha and the associated prior gamma orientations are
% available, variant analysis can be conducted.
% Plot the possible variants in a pole figure
plotPDF_variants(job);
% Then calculate the variant IDs of all alpha grains ...
job.calcVariants;
% ... and plot them
plotMap_variants(job,'linewidth',1);
%plotMap_variants(job,'grains','linewidth',3); %Plot grain data instead
% The same can be done for the packets
plotMap_packets(job,'linewidth',3);
%plotMap_packets(job,'grains','linewidth',3); %Plot grain data instead
%% Plot reconstructed parent EBSD orientations and the IPF key
parentIPFkey = plotMap_IPF_p2c(job,vector3d.Z,'linewidth',3,'parent');
figure; plot(parentIPFkey);
%% Save images
saveImage(Ini.imagePath);
%% Check the gamma grains interactively by clicking on them
grainClick(job,'noScalebar','noFrame'); %Plot EBSD data
% grainClick(job,'grains','noScalebar','noFrame'); %Plot grain data
%% Refine gamma twins by clicking on gamma grains
grainClick(job,'parentTwins');