Document Type

Article

Publication Date

7-10-2025

Publication Title

Materials

Abstract

Magnesium-containing multi-principal element alloys (MPEAs) are promising for lightweight applications due to their low density, high specific strength, and biocompatibility. This study examines two Mg-Ti-Zn alloy compositions, equal molar MgTiZn (TZ) and Mg4TiZn (4TZ), synthesized via ball milling followed by spark plasma sintering, focusing on their microstructures and corrosion behaviors. X-ray diffraction and transmission electron microscopy revealed the formation of intermetallic phases, including Ti2Zn and Mg21Zn25 in TZ, while 4TZ exhibited a predominantly Mg-rich phase. Potentiodynamic polarization and immersion tests in 0.1 M NaCl solution showed that both alloys had good corrosion resistance, with values of 3.65 +/- 0.65 mu A/cm2 for TZ and 4.58 +/- 1.64 mu A/cm2 for 4TZ. This was attributed to the formation of a TiO2-rich surface film in the TZ, as confirmed by X-ray photoelectron spectroscopy (XPS), which contributed to enhanced passivation and lower corrosion current density. Both alloys displayed high hardness, 5.5 +/- 1.0 GPa for TZ and 5.1 +/- 0.9 GPa for 4TZ, and high stiffness, with Young's modulus values of 98.2 +/- 11.2 GPa for TZ and 100.8 +/- 9.6 GPa for 4TZ. These findings highlight the potential of incorporating Ti and Zn via mechanical alloying to improve the corrosion resistance of Mg-containing MPEAs and Mg-based alloys.

Comments

This research was funded by the National Science Foundation (NSF-CMMI 2131441) under the direction of Alexis Lewis.

DOI

10.3390/ma18143279

Version

Publisher's PDF

Creative Commons License

Creative Commons Attribution 4.0 International License
This work is licensed under a Creative Commons Attribution 4.0 International License.

Volume

18

Issue

14

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