Intergranular and Intragranular Precipitation on Continuous Cooling in Metastable β Ti-19Nb-2.5Fe-6Sn Alloy

Autor(es)

Leticia F. Starck ^[1] ; Maria Fernanda C. de Melo ^[2] ; Isabella C. Lancini ^[3] ; Marcio S.C. da Silva ^[4] ; João Felipe Q. Rodrigues ^[5] ; Alessandra Cremasco ^[6] ; Rubens Caram ^[7]

Afiliação do(s) autor(es)

^[1] Universidade de Campinas. Escola de Engenharia Mecânica - Brasil

^[2] Universidade de Campinas. Escola de Engenharia Mecânica - Brasil

^[3] Universidade de Campinas. Escola de Engenharia Mecânica - Brasil

^[4] Universidade de Campinas. Escola de Engenharia Mecânica - Brasil

^[5] Universidade de Campinas. Escola de Engenharia Mecânica - Brasil

^[6] Universidade de Campinas. Faculdade de Ciências Aplicadas - Brasil

^[7] Universidade de Campinas. Escola de Engenharia Mecânica - Brasil

• Tipo de documento: Artigo Científico
• Fonte: MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS; v. 26, 2023-07-03.

Resumo

The Ti-19Nb-2.5Fe-6Sn alloy subjected to proper heat treatments is a promising material to be applied in orthopedic implants. This type of Ti alloy presents relatively low cost, good biocompatibility, and reasonable mechanical strength combined with low elastic modulus. In such an alloy, Fe improves mechanical strength while ω phase precipitation can be controlled by Sn addition. In this work, samples of the Ti-19Nb-2.5Fe-6Sn (wt.%) alloy were prepared by arc melting, hot swaging, and solution heat treatment. Results from the literature combined with thermodynamic simulations, differential scanning calorimetry (DSC), and heating/cooling experiments coupled with microstructural analyses were applied to determine the β transus temperature of this alloy. Following, the samples were solution heat treated in the β field and continuously cooled to room temperature at different rates. The effects of cooling rates on intergranular and intragranular α phase precipitation were evaluated. It was found that low cooling rates lead to intergranular precipitation while moderate cooling rates provide more expressive intragranular precipitation. (AU)

• Processo FAPESP: 18/18293-8 - Ligas de titânio: transformações de fases e manufatura aditiva aplicadas na obtenção de materiais com gradientes funcionais
• Beneficiário: Rubens Caram Junior
• Modalidade de apoio: Auxílio à Pesquisa - Temático