Microstructural Evolution of Ti-6Al-7Nb Alloy During High Pressure Torsion
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Data
2012-09-01
Autores
Pinheiro, Tiago Santos
Gallego, Juno [UNESP]
Bolfarini, Claudemiro
Kiminami, Claudio Shyinti
Jorge, Alberto Moreira
Botta, Walter Jose
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Universidade Federal de São Carlos (UFSCar), Dept Engenharia Materials
Resumo
Ti-6Al-7Nb alloys are being evaluated for biomedical applications, in substitution of the more conventional Ti-6Al-7V. Both types of alloys present a microstructure containing the alpha and the beta phases, which result in good compromise for mechanical applications. In the present work Ti-6Al-7Nb alloys were processed by High Pressure Torsion (HPT), varying the number of revolutions and thus the total imposed strain. X-Ray Diffraction (XRD) results revealed the formation of different crystallographic textures in samples subjected to HPT. Microhardness distribution, across the diameters of the disks, is rather homogeneous for all samples, with higher values for those subjected to 03 and 05 turns. Transmission electron microscopy (TEM) micrographs have showed that an ultra-fine grained microstructure was obtained in all the samples.
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high pressure torsion, severe plastic deformation, titanium alloys, microstructural analysis
Como citar
Materials Research-ibero-american Journal of Materials. São Carlos: Universidade Federal de São Carlos (UFSCar), Dept Engenharia Materials, v. 15, n. 5, p. 792-795, 2012.