Title
A multi-scale characterization of deformation twins in Ti6Al4V sheet material deformed by simple shear A multi-scale characterization of deformation twins in Ti6Al4V sheet material deformed by simple shear
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Lausanne ,
Subject
Physics
Source (journal)
Materials science and engineering: part A: structural materials: properties, microstructure and processing. - Lausanne
Volume/pages
527(2010) :16/17 , p. 4136-4145
ISSN
0921-5093
ISI
000278766800068
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Ti6Al4V sheet material is subjected to simple shear deformation with strain ratio's of 10%, 30% and 50%. Optical microscopy, transmission electron microscopy and electron backscatter diffraction techniques are applied to study the presence and morphology of deformation twins. Only the View the MathML source type of twins seems to be present with a volume fraction below 1%. These View the MathML source twins show a high density of basal stacking faults of the ABABACAC type identified using atomic resolution transmission electron microscopy. A resolved shear stress analysis shows that twins most often occur on those planes with the highest resolved shear stresses, but that the starting texture is not beneficial for the occurrence of twins. It is further suggested that a transitory strain hardening regime observed around 530 MPa might be related with the onset of twinning.
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