Enhanced mechanical properties and corrosion resistance by minor Gd alloying with a hot-extruded Mg alloy
Yao, Huai; Wang, Shubo; Xiong, Yi; Shi, Xinying; Singh, Harishchandra; Huttula, Marko; Cao, Wei (2022-05-26)
Yao, H., Wang, S., Xiong, Y. et al. Enhanced Mechanical Properties and Corrosion Resistance by Minor Gd Alloying with a Hot-Extruded Mg Alloy. J. of Materi Eng and Perform 31, 9997–10009 (2022). https://doi.org/10.1007/s11665-022-07024-8
© ASM International. This version of the article has been accepted for publication, after peer review (when applicable) and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: https://doi.org/10.1007/s11665-022-07024-8
https://rightsstatements.org/vocab/InC/1.0/
https://urn.fi/URN:NBN:fi-fe202301051592
Tiivistelmä
Abstract
The microstructure, mechanical properties, and corrosion resistance to simulated body fluid solution behavior of as-extruded Mg-1.8Zn-0.5Zr alloys with different Gd additions are investigated. It is found that dynamic recrystallization occurs in the alloys during extrusion and the grain size gradually decreases with Gd alloying. The mechanical properties and corrosion resistance to simulated body fluid of the investigated alloys enhance firstly and then weaken with the increase in Gd content. The results reveal that the Mg-1.8Zn-0.5Zr with a 1.5 wt.% Gd addition has optimized mechanical properties and corrosion resistance. A three-stage corrosion mechanism, including sequential stages from hydroxidation, phosphatization and hydroxidation, to formation-dissolution dynamic equilibrium, is proposed through electrochemical measurements and corroded surface analyses. This study reveals the extruded Mg-1.8Zn-0.5Zr-1.5Gd alloy can be regarded as a potential candidate for using as biodegradable magnesium implants.
Kokoelmat
- Avoin saatavuus [38358]