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

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

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 °C for 3 h, hot rolled and hot rolled and aged at 250 °C. The aging behavior of the rolled a...

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Bibliographic Details
Published in:Metals (Basel ) Vol. 11; no. 11; p. 1855
Main Authors: de Freitas, Bruno Xavier, Antonini, Leonardo A., Cury, Paula L. C. T., da Silva, Viviane L. F., Chaia, Nabil, Tomachuk, Célia R., Mathieu, Stéphane, Coelho, Gilberto C., dos Santos, Claudinei, Nunes, Carlos A.
Format: Journal Article
Language:English
Published: Basel MDPI AG 01-11-2021
MDPI
Subjects:
Aging (metallurgy)
aging hardening
Alloys
Aqueous solutions
Chemical Sciences
Corrosion
Corrosion rate
Corrosion resistance
electrochemical
Electrochemical analysis
Electrochemical impedance spectroscopy
Electrode polarization
Electrodes
Grain size
Heat
Hot rolling
Human body
Mg alloys
MgDy alloy
MgDyZnZr hot rolled
Orthopedics
Radiation
Scanning electron microscopy
Transplants & implants
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Summary: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 °C for 3 h, hot rolled and hot rolled and aged at 250 °C. The aging behavior of the rolled alloy was investigated during isothermal aging at 250 °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 °C by potentiodynamic polarization and electrochemical impedance spectroscopy. The 525 °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 °C for 10 h specimen presented a grain size of 11.8 ± 1.7 μm 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.
ISSN:2075-4701
2075-4701
DOI:10.3390/met11111855