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Structural and mechanical study on Mg–xLM (x = 0–5 wt.%, LM = Sn, Ga) alloys

  • Jiří Kubásek , Dalibor Vojtěch and Drahomír Dvorský
Published/Copyright: April 30, 2016
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 107 Issue 5

Abstract

Low-melting point metals, such as Sn and Ga, can improve both the mechanical and corrosion properties of pure Mg. Currently, Mg–Sn based alloys are being considered for high-temperature applications, and both Mg–Sn and Mg–Ga based alloys are also being considered as possible candidates for biodegradable materials. Although these binary systems have already been the subject of research, only limited information on their characteristics has been published. Therefore, as-cast Mg–Sn and Mg–Ga alloys containing 1, 3.5 and 5 wt.% of alloying elements were studied in the present work. Moreover, the effect of extrusion on Mg–Sn and Mg–Ga alloys containing 3.5 wt.% of the alloying element was studied. Structural and chemical analyses of the alloys were performed by using light and scanning electron microscopy, energy dispersive spectrometry and X-ray diffraction. The mechanical properties were determined by Vickers hardness measurements and tensile and compressive testing. The as-cast alloys were characterized by a dendritic morphology with the presence of secondary eutectic phases. Both Sn and Ga exhibited hardening and strengthening effects on magnesium. The extruded alloys were characterized by fine-grained microstructures with a grain size of approximately 3 and 6 μm for Mg-3.5Sn and Mg-3.5Ga alloys, respectively, and significantly improved mechanical properties compared with the as-cast state. The ultimate tensile strength reached almost 250 MPa for both extruded alloys compared with 120–150 MPa for the as-cast condition. The results indicate that Mg–Sn- and Mg–Ga-based alloys appear to be suitable candidates for both engineering and medical applications.

Keywords: Magnesium alloys; Casting; Thermomechanical processing; Electron microscopy; Mechanical characterization
*Correspondence address, Ing. Jiri Kubasek, Department of Metals and Corrosion Engineering, University of Chemistry and Technology Prague, Technická 5, Prague, 16628, Czech Republic. Tel.: +420220444055, E-mail:

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Received: 2015-09-01
Accepted: 2016-02-02
Published Online: 2016-04-30
Published in Print: 2016-05-13

© 2016, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.111363
Keywords for this article
Magnesium alloys; Casting; Thermomechanical processing; Electron microscopy; Mechanical characterization

Articles in the same Issue

  1. Contents
  2. Contents
  3. Original Contributions
  4. Microstructural evolution and creep of Fe–Al–Ta alloys
  5. Creep behaviour characterisation of a ferritic steel alloy based on the modified theta-projection data at an elevated temperature
  6. Facile fabrication, microstructure, and corrosion resistance of high-strength, high-hardness pure bulk aluminum
  7. A method for improving the mechanical properties of a hypereutectic Al–Si alloy by introducing the α-Al phase
  8. Experimental investigation by atomic force microscopy on mechanical and tribological properties of thin films
  9. Influence of ceramic B4C particulate addition on tensile behavior of 6061 aluminum matrix
  10. Role of cerium, lanthanum, and strontium additions in an Al – Si – Mg (A356) alloy
  11. Structural and mechanical study on Mg–xLM (x = 0–5 wt.%, LM = Sn, Ga) alloys
  12. Weibull distribution application on temperature dependence of polyurethane storage modulus
  13. Hierarchical bismuth phosphate microspheres with high photocatalytic performance
  14. Influence of calcination temperature on sol–gel synthesized single-phase bismuth titanate for high dielectric capacitor applications
  15. People
  16. Prof. Dr. Wolfgang Bleck on the occasion of his 65th birthday
  17. DGM News
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