J. Mater. Sci. Technol. ›› 2017, Vol. 33 ›› Issue (7): 652-660.DOI: 10.1016/j.jmst.2016.09.019

Special Issue: 2017腐蚀与防护专辑 2017-2018年Mg合金专题

• Orginal Article • Previous Articles     Next Articles

Superior Properties of Mg-4Y-3RE-Zr Alloy Prepared by Powder Metallurgy

Kubásek Ji?í1,*(), Dvorsky Drahomír1, ?avojsky Miroslav2, Vojtěch Dalibor1, Beronská Nad'a2, Fousová Michaela1   

  1. 1 Department of Metals and Corrosion Engineering, University of Chemistry and Technology Prague, Technická5, 166 28 Prague 6, Czech Republic
    2 Institute of Materials and Machine Mechanics SAS, Slovak Academy of Sciences, Dúbravská cesta 9, 845 13 Bratislava, Slovak Republic
  • Received:2016-07-08 Revised:2016-08-22 Accepted:2016-09-21 Online:2017-07-20 Published:2017-08-29
  • Contact: Kubásek Ji?í

Abstract:

Magnesium alloys are important materials for application in the automotive and aviation industries. During the last few years, the number of possible applications as biodegradable implants in medicine has grown. Mg-RE (rare earth) alloys belong to the most advanced group of products, offering the best combination of mechanical properties and corrosion resistance. Among these materials, WE43 (Mg-Y-Nd) is a very well-known commercial alloy that has been extensively studied for applications at increased temperatures and also in organisms. Although this material has been described, there are still possibilities to improve its properties and subsequently expand its applicability. Powder metallurgy has already been used for the preparation of magnesium alloys with superior mechanical properties and occasionally superior corrosion properties. Therefore, the present paper is oriented toward the preparation of Mg-4Y-3RE-Zr (WE43) alloy by the powder metallurgy technique (WE43-PM) and comparison of the final properties with the product of extrusion of as-cast ingot (WE43-IM). Our processing leads to a partial improvement in the mechanical properties and superior corrosion resistance of WE43-PM. The texture strength of WE43-PM was low, and therefore, anisotropy of mechanical properties was suppressed.

Key words: Magnesium alloys, REEs (rare earth elements), Powder metallurgy, Mechanical properties, Corrosion