Formation of low-angle boundaries accompanying the deformation process by twinning in titanium

The structure of the transition zone of the wedge twin formed inside the grains of polycrystalline titanium was experimentally investigated. The accumulation of low-angle grain boundaries formed during the deformation by twin growing was discovered. Mathematical modeling of the stress state close to...

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Bibliographic Details
Published in:Materials letters 2016-11, Vol.182, p.253-256
Main Authors: Nikulin, I.S., Kamyshanchenko, N.V., Nikulicheva, T.B., Mishunin, M.V., Vokhmyanina, K.A.
Format: Article
Language:English
Subjects:
Boundaries
Defects
Deformation
Dislocation walls
Formations
Grain boundaries
Mathematical modeling
Mathematical models
Stress
Titanium
Twinning
Walls
Wedges
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Summary:The structure of the transition zone of the wedge twin formed inside the grains of polycrystalline titanium was experimentally investigated. The accumulation of low-angle grain boundaries formed during the deformation by twin growing was discovered. Mathematical modeling of the stress state close to the twin zone was described in context of the macroscopic dislocation model. The model allows describing physical processes responsible for the formation of low-angle grain boundaries in a form of dislocation walls close to the transition zone of the wedge twin. •Low-angle grain boundaries arises in the twin's transition zone.•This is the result of high internal stresses in the transition zone.•The results are in good agreement with the developed mathematical model.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2016.06.127