Alpha Variant Selection Determined from Grain Misorientations in Ti-6Al-7Nb Alloy with a Duplex Microstructure

• Authors: P. Harcuba , K. Václavová , J. Čapek , J. Stráský , M. Janeček , M. Janovská
• Languages of publication: EN

Abstracts

EN

Titanium occurs in two structures; a high temperature body-centered cubic structure which is known as β phase and an ambient temperature α phase which has the hexagonal closed-packed structure. In the present study a biomedical Ti-6Al-7Nb alloy was investigated. The so-called duplex structure consisting of α lamellae and equiaxed primary α-grains was prepared by a thermal treatment. The α lamellae are created during cooling from a β-field according to the Burgers relation. This relation allows the formation of the α lamellae with different crystallographic orientations - so-called variants. The preferential misorientation between α lamellae was studied by a detailed electron backscattered diffraction analysis. The misorientation of grains in the duplex structure was modelled by a sum of random Mackenzie distribution and Gaussian peaks related to the preferred misorientations according to the Burgers relation. The preferred misorientations based on the Burgers relationship were identified in the biomedical Ti-6Al-7Nb alloy with duplex structure. It is confirmed that the variant selection of α lamellae is not random.

Keywords

EN

61.66.Dk; 61.72.Mm; 68.37.-d

Discipline

• 61.72.Mm: Grain and twin boundaries
• 68.37.-d: Microscopy of surfaces, interfaces, and thin films
• 61.66.Dk: Alloys

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2015
• Volume: 128
• Issue: 4
• Pages: 570-573

Dates

published

2015-10

Contributors

author

P. Harcuba

• Department of Physics of Materials, Charles University in Prague, Ke Karlovu 5, 121 16, Prague, Czech Republic

author

K. Václavová

• Department of Physics of Materials, Charles University in Prague, Ke Karlovu 5, 121 16, Prague, Czech Republic

author

J. Čapek

• Department of Physics of Materials, Charles University in Prague, Ke Karlovu 5, 121 16, Prague, Czech Republic

author

J. Stráský

• Department of Physics of Materials, Charles University in Prague, Ke Karlovu 5, 121 16, Prague, Czech Republic

author

M. Janeček

• Department of Physics of Materials, Charles University in Prague, Ke Karlovu 5, 121 16, Prague, Czech Republic

author

M. Janovská

• Academy of Sciences of the Czech Republic, Institute of Thermomechanics, Prague, Czech Republic

References

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Identifiers

DOI

10.12693/APhysPolA.128.570