Microstructure, mechanical and corrosion properties of Mg-Dy-Gd-Zr alloys for medical applications

Publikation: Beiträge in ZeitschriftenZeitschriftenaufsätzeForschungbegutachtet

Authors

  • L. Yang
  • Y. Huang
  • F. Feyerabend
  • R. Willumeit
  • C. Mendis
  • K. U. Kainer
  • N. Hort

In previous investigations, a Mg-10Dy (wt.%) alloy with a good combination of corrosion resistance and cytocompatibility showed great potential for use as a biodegradable implant material. However, the mechanical properties of Mg-10Dy alloy are not satisfactory. In order to allow the tailoring of mechanical properties required for various medical applications, four Mg-10(Dy + Gd)-0.2Zr (wt.%) alloys were investigated with respect to microstructure, mechanical and corrosion properties. With the increase in Gd content, the number of second-phase particles increased in the as-cast alloys, and the age-hardening response increased at 200 C. The yield strength increased, while the ductility reduced, especially for peak-aged alloys with the addition of Gd. Additionally, with increasing Gd content, the corrosion rate increased in the as-cast condition owing to the galvanic effect, but all the alloys had a similar corrosion rate (∼0.5 mm year-1) in solution-treated and aged condition.

OriginalspracheEnglisch
ZeitschriftActa Biomaterialia
Jahrgang9
Ausgabenummer10
Seiten (von - bis)8499-8508
Anzahl der Seiten10
ISSN1742-7061
DOIs
PublikationsstatusErschienen - 11.2013
Extern publiziertJa

DOI

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Forschende

  1. Günter Nitsche

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