Title: EBSD characterization of an ECAP deformed Nb single crystal
Authors: Zhu, Liang ×
Sandim, Hugo R.Z.
Seefeldt, Marc
Verlinden, Bert #
Issue Date: Sep-2010
Publisher: Springer Science + Business Media
Series Title: Journal of Materials Science vol:45 issue:17 pages:4672-4681
Abstract: A niobium single crystal was subjected to equal channel angular pressing (ECAP) at room temperature after orienting the crystal such that [1 -1 -1] ayen ND, [0 1 -1] ayen ED, and [-2 -1 -1] ayen TD. Electron backscatter diffraction (EBSD) was used to characterize the microstructures both on the transverse and the longitudinal sections of the deformed sample. After one pass of ECAP the single crystal exhibits a group of homogeneously distributed large misorientation sheets and a well formed cell structure in the matrix. The traces of the large misorientation sheets match very well with the most favorably oriented slip plane and one of the slip directions is macroscopically aligned with the simple shear plane. The lattice rotation during deformation was quantitatively estimated through comparison of the orientations parallel to three macroscopic axes before and after deformation. An effort has been made to link the microstructure with the initial crystal orientation. Collinear slip systems are believed to be activated during deformation. The full constraints Taylor model was used to simulate the orientation evolution during ECAP. The result matched only partially with the experimental observation.
ISSN: 0022-2461
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Physical Metallurgy and Materials Engineering Section (-)
Department of Materials Engineering - miscellaneous
Mechanical Metallurgy Section (-)
× corresponding author
# (joint) last author

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