Influence of Thermal Oxidation on the Creep Behavior of Ti-6Al-4V Alloy
oleh: Gisele F. C. Almeida, Alexandra A. Arbex, Hamon V. S. Oliveira, Nilton I. Domingues, Jan Vatavuk, Danieli A.P. Reis, Marcos Massi, Antônio A. Couto
| Format: | Article |
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| Diterbitkan: | Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol) 2023-07-01 |
Deskripsi
The formation of a stable and adherent oxide layer on the Ti-6Al-4V alloy can improve the mechanical and corrosion resistance of this material. This work studied the creep behavior of Ti-6Al-4V alloy after two different thermal oxidation conditions: at 650 °C for 12 h and at 800 °C for 2 h. In the XRD analysis of the oxidized samples, it was possible to observe the formation of rutile (TiO2) and a displacement of the peaks of α and β phases caused by the dissolution of oxygen. In the creep test at 550 °C, the material oxidized at 800 °C for 2 h showed a greater creep life at 125 MPa, the crack took longer to brake probably due to the greater thickness of the layer. At 550°C and 187.5 MPa the material oxidized at 650 °C for 12h has a better creep life, probably due to the layer more adhered.