Microstructure, mechanical and corrosion properties of Mg-Dy-Gd-Zr alloys for medical applications
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in: Acta Biomaterialia, Jahrgang 9, Nr. 10, 11.2013, S. 8499-8508.
Publikation: Beiträge in Zeitschriften › Zeitschriftenaufsätze › Forschung › begutachtet
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TY - JOUR
T1 - Microstructure, mechanical and corrosion properties of Mg-Dy-Gd-Zr alloys for medical applications
AU - Yang, L.
AU - Huang, Y.
AU - Feyerabend, F.
AU - Willumeit, R.
AU - Mendis, C.
AU - Kainer, K. U.
AU - Hort, N.
PY - 2013/11
Y1 - 2013/11
N2 - 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.
AB - 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.
KW - Corrosion properties
KW - Mechanical properties
KW - Mg-Dy-Gd-Zr alloys
KW - Microstructure
KW - Engineering
UR - http://www.scopus.com/inward/record.url?scp=84884672923&partnerID=8YFLogxK
U2 - 10.1016/j.actbio.2013.03.017
DO - 10.1016/j.actbio.2013.03.017
M3 - Journal articles
C2 - 23523938
AN - SCOPUS:84884672923
VL - 9
SP - 8499
EP - 8508
JO - Acta Biomaterialia
JF - Acta Biomaterialia
SN - 1742-7061
IS - 10
ER -