Microstructural evolution of Ti-6Al-7Nb alloy during high pressure torsion

Materials Research

Tiago Santos Pinheiro²  Juno Gallego¹  Claudemiro Bolfarini²  Cláudio Shyinti Kiminami²  Alberto Moreira Jorge Jr.²  Walter José Botta Filho² 

[1] ,Federal University of São Carlos Department of Materials Engineering São Carlos SP ,Brazil

关键词: high pressure torsion;    severe plastic deformation;    titanium alloys;    microstructural analysis;   

DOI  :  10.1590/S1516-14392012005000102

来源: SciELO

【 摘 要 】

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 α and the β 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.

【 授权许可】

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