Very high strain rate deformation twinning behaviour of Ti–6Al–4V
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Authors
Lainé, SJ
Knowles, Kevin
Rugg, D
Publication Date
2020-08-01Journal Title
Materialia
ISSN
2589-1529
Volume
12
Type
Article
This Version
AM
Metadata
Show full item recordCitation
Lainé, S., Knowles, K., & Rugg, D. (2020). Very high strain rate deformation twinning behaviour of Ti–6Al–4V. Materialia, 12 https://doi.org/10.1016/j.mtla.2020.100762
Abstract
Equiaxed fine-grained and coarse-grained samples of h.c.p. α phase Ti–6Al–4V with trace amounts of retained b.c.c. β phase were ballistically tested at room temperature. The deformed microstructures were characterised by electron back scattered diffraction. The extensive deformation twinning observed in the α phase in both samples was limited to the {1 0 -1 2} and {1 1 -2 1} tensile twinning modes. These two deformation twinning types have very different morphologies: thin {1 1 -2 1} deformation twins span multiple α phase grain boundaries, while the wider {1 0 -1 2} deformation twins are usually limited to individual grains, reorienting almost entire grains to a twinned orientation. Both {1 0 -1 2} and {1 1 -2 1} deformation twins are able to propagate across low angle α lath boundaries, but only the {1 1 -2 1} deformation twinning types can propagate across high angle α grain boundaries.
Sponsorship
This work was supported by the Rolls-Royce plc/EPSRC strategic partnership under EP/H022309/1.
Funder references
UNIVERSITY OF BIRMINGHAM (FB EPSRC) (EP/H022309/1)
Embargo Lift Date
2021-08-01
Identifiers
External DOI: https://doi.org/10.1016/j.mtla.2020.100762
This record's URL: https://www.repository.cam.ac.uk/handle/1810/305804
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