Senkov, O.
, Meisenkothen, F.
and Wheeler, R.
(2024),
Rotational deformation twins in a HfNbTaTiZr refractory high entropy alloy, Acta Materialia, [online], https://doi.org/10.1016/j.actamat.2024.120435, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=958475
(Accessed January 31, 2025)
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Rotational deformation twins in a HfNbTaTiZr refractory high entropy alloy
Published
Author(s)
Oleg Senkov, , Robert Wheeler
Abstract
Results of the analysis of deformation twins formed in HfNbTaTiZr refractory high entropy alloy during compression deformation at 20 °C – 600 °C are reported. All studied twins were formed by rotation of the matrix crystal lattice around a <110> pole and have the common reciprocal twinning plane K2 = 001} and reciprocal twinning direction η2 = <11 ̅0>. At the same time, the twinning plane K1 and direction η1 depend on the degree of rotation of K2 and η2 around the common <110> pole. The following rotational twinning modes have been identified in HfNbTaTiZr: 11 ̅4}<22 ̅1 ̅> (38.94° rotation), 11 ̅5}<55 ̅2 ̅> (31.58°), 11 ̅6}<33 ̅1 ̅> (26.54°), 11 ̅7}<77 ̅2 ̅> (22.84°), and 11 ̅8}<44 ̅1 ̅> (20.04°). A rotational mechanism of twinning, with the rotation axis <011> or <001>, is proposed as an alternative to the commonly accepted shear mechanism.Citation
Acta Materialia
Volume
281
Pub Type
Journals
Download Paper
Keywords
high entropy alloy, deformation, Senkov alloy, twinning
Citation
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Created September 26, 2024, Updated October 3, 2024