Hassan Jafari, Amir Houshang Mojiri Tehrani, and Mahsa Heydari, Effect of extrusion process on microstructure and mechanical and corrosion properties of biodegradable Mg-5Zn-1.5Y magnesium alloy, Int. J. Miner. Metall. Mater.,(2021). https://doi.org/10.1007/s12613-021-2275-5
Cite this article as:
Hassan Jafari, Amir Houshang Mojiri Tehrani, and Mahsa Heydari, Effect of extrusion process on microstructure and mechanical and corrosion properties of biodegradable Mg-5Zn-1.5Y magnesium alloy, Int. J. Miner. Metall. Mater.,(2021). https://doi.org/10.1007/s12613-021-2275-5
Research Article

Effect of extrusion process on microstructure and mechanical and corrosion properties of biodegradable Mg-5Zn-1.5Y magnesium alloy

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  • Received: 22 October 2020Revised: 29 January 2021Accepted: 26 February 2021Available online: 27 February 2021
  • The effect of extrusion temperature and ratio on microstructure, hardness, compression, and corrosion behavior of Mg-5Zn-1.5Y alloy were analyzed. The microstructural observations revealed that the cast alloy consists of α-Mg grains, and Mg3Zn6Y and Mg3Zn3Y2 intermetallic compounds, mostly located on the α-Mg grain boundaries. Extruded alloy at higher temperatures showed coarser grain microstructures, whereas those extruded at higher ratios contained finer ones, although more DRXed grains with lower intermetallics were measured at both conditions. Combined conditions of the lower temperature (340°C) and higher ratio (1:11.5) provided higher compressive strengths. However, no significant hardness improvement was achieved. The extrusion process could decrease the corrosion rate of the cast alloy in simulated body fluid for over 80% due to primarily the refined microstructure. The extrusion temperature showed a more pronounced effect on corrosion resistance compared to the extrusion ratio, and the higher the extrusion temperature, the higher the corrosion resistance.
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