Microstructural Evolution and Electrochemical Behavior of Solution Treated, Hot Rolled and Aged MgDyZnZr Alloy

Autor(es)

de Freitas, Bruno Xavier ; Antonini, Leonardo A. ; Cury, Paula L. C. T. ; da Silva, Viviane L. F. ; Chaia, Nabil ; Tomachuk, Celia R. ; Mathieu, Stephane ; Coelho, Gilberto C. ; dos Santos, Claudinei ; Nunes, Carlos A.

• Tipo de documento: Artigo Científico
• Fonte: METALS; v. 11, n. 11, p. 16-pg., 2021-11-01.

Resumo

In order to develop a potential route to fabricate plates and clips for orthopedic applications, a Mg-3.4Dy-0.2Zn-0.4Zr (wt.%) alloy was produced and analyzed in different conditions: solution treated at 525 degrees C for 3 h, hot rolled and hot rolled and aged at 250 degrees C. The aging behavior of the rolled alloy was investigated during isothermal aging at 250 degrees C, and a significant peak was observed at 10 h. The electrochemical behavior was evaluated in 0.9 wt.% NaCl solution at 37 +/- 0.5 degrees C by potentiodynamic polarization and electrochemical impedance spectroscopy. The 525 degrees C-3 h and hot rolled specimens exhibited corrosion rates of 2.0 and 1.7 mm/year, respectively. The hot rolled and aged at 250 degrees C for 10 h specimen presented a grain size of 11.8 +/- 1.7 mu m with an intense macrotexture of the basal {0002} plane, hardness of 73 +/- 3 HV and higher impedance modulus and obtained the highest corrosion resistance with a corrosion rate of 0.9 mm/year. (AU)

• Processo FAPESP: 17/17257-5 - Processamento e caracterização da liga Mg-3,4Dy-0,2Zn-0,4Zr (%massa) visando aplicação como biomaterial
• Beneficiário: Leonardo Anjolette Antonini
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 18/20375-2 - Processamento e caracterização microestrutural e mecânica da liga biodegradável Mg-4,8Y-2,8Gd-0,7Zr (% massa) para aplicações biomédicas
• Beneficiário: Viviane Lima Freitas da Silva
• Modalidade de apoio: Bolsas no Brasil - Mestrado