Mechanical properties and corrosion behavior of Mg-Gd-Ca-Zr alloys for medical applications
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In: Journal of the Mechanical Behavior of Biomedical Materials, Vol. 47, 01.07.2015, p. 38-48.
Research output: Journal contributions › Journal articles › Research › peer-review
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TY - JOUR
T1 - Mechanical properties and corrosion behavior of Mg-Gd-Ca-Zr alloys for medical applications
AU - Shi, Ling ling
AU - Huang, Yuanding
AU - Yang, Lei
AU - Feyerabend, Frank
AU - Mendis, Chamini
AU - Willumeit, Regine
AU - Ulrich Kainer, Karl
AU - Hort, Norbert
PY - 2015/7/1
Y1 - 2015/7/1
N2 - Magnesium alloys are promising candidates for biomedical applications. In this work, influences of composition and heat treatment on the microstructure, the mechanical properties and the corrosion behavior of Mg-Gd-Ca-Zr alloys as potential biomedical implant candidates were investigated. Mg5Gd phase was observed at the grain boundaries of Mg-10Gd-xCa-0.5Zr (x=0, 0.3, 1.2wt%) alloys. Increase in the Ca content led to the formation of additional Mg2Ca phase. The Ca additions increased both the compressive and the tensile yield strengths, but reduced the ductility and the corrosion resistance in cell culture medium. After solution heat treatment, the Mg5Gd particles dissolved in the Mg matrix. The compressive strength decreased, while the corrosion resistance improved in the solution treated alloys. After ageing at 200°C, metastable β' phase formed on prismatic planes and a new type of basal precipitates have been observed, which improved the compressive and tensile ultimate strength, but decreased the ductility.
AB - Magnesium alloys are promising candidates for biomedical applications. In this work, influences of composition and heat treatment on the microstructure, the mechanical properties and the corrosion behavior of Mg-Gd-Ca-Zr alloys as potential biomedical implant candidates were investigated. Mg5Gd phase was observed at the grain boundaries of Mg-10Gd-xCa-0.5Zr (x=0, 0.3, 1.2wt%) alloys. Increase in the Ca content led to the formation of additional Mg2Ca phase. The Ca additions increased both the compressive and the tensile yield strengths, but reduced the ductility and the corrosion resistance in cell culture medium. After solution heat treatment, the Mg5Gd particles dissolved in the Mg matrix. The compressive strength decreased, while the corrosion resistance improved in the solution treated alloys. After ageing at 200°C, metastable β' phase formed on prismatic planes and a new type of basal precipitates have been observed, which improved the compressive and tensile ultimate strength, but decreased the ductility.
KW - Biomedical Applications
KW - Corrosion behavior
KW - Gadolinium
KW - Magnesium
KW - Mechanical properties
KW - Engineering
UR - http://www.scopus.com/inward/record.url?scp=84938585170&partnerID=8YFLogxK
U2 - 10.1016/j.jmbbm.2015.03.003
DO - 10.1016/j.jmbbm.2015.03.003
M3 - Journal articles
C2 - 25837343
AN - SCOPUS:84938585170
VL - 47
SP - 38
EP - 48
JO - Journal of the Mechanical Behavior of Biomedical Materials
JF - Journal of the Mechanical Behavior of Biomedical Materials
SN - 1751-6161
ER -