1.0.1 Light microscope images
Material condition: M – As manufactured (extrusion), without specified mechanical properties
- Images of etched specimen at 100, 200 and 500 times magnification.
- The duplex phase microstructure can be seen. Alpha phase bright and beta phase darker.
- Etching: 5g ferric chloride + 10ml conc. hydrochloric acid + 100 ml de-ionised water.
- Specimen surface was parallel with extrusion direction (X=ED). Position ¼ depth.
1.0.2 EBSD/EDS analysis in the SEM
EBSD analysis with 1 µm step size
The material show a duplex microstructure consisting of alpha-beta phase. In this limited area it is difficult to make assumptions about grain size, phase fractions and texture.
Specimen surface was parallel with extrusion direction (X=ED). Position ¼ depth.
Surface was OP-S-polished.
Grain- and phase boundaries
In this material there are not a lot of grain boundaries or low angle boundaries. The assumption would be that recrystallisation occurred after extrusion.
EDS mapping in parallel to EBSD analysis
Large area mapping – Many (>40) analyses stitched together
The large area make statistics for grain size, phase fractions, texture, etc. better and now it is obvious that there ARE preferred orientations in X (ED). Pole figures for both phases show textures for the alpha phase <100>&<111>//ED, and for the beta phase <110> // ED.
Grain size, area weighted distribution