Microhardness and in vitro corrosion of heat-treated Mg-Y-Ag biodegradable alloy
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In: Materials, Vol. 10, No. 1, 55, 11.01.2017.
Research output: Journal contributions › Journal articles › Research › peer-review
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TY - JOUR
T1 - Microhardness and in vitro corrosion of heat-treated Mg-Y-Ag biodegradable alloy
AU - Vlček, Marián
AU - Lukáč, František
AU - Kudrnová, Hana
AU - Smola, Bohumil
AU - Stulíková, Ivana
AU - Luczak, Monika
AU - Szakács, Gábor
AU - Hort, Norbert
AU - Willumeit-Römer, Regine
PY - 2017/1/11
Y1 - 2017/1/11
N2 - Magnesium alloys are promising candidates for biodegradable medical implants which reduce the necessity of second surgery to remove the implants. Yttrium in solid solution is an attractive alloying element because it improves mechanical properties and exhibits suitable corrosion properties. Silver was shown to have an antibacterial effect and can also enhance the mechanical properties of magnesium alloys. Measurements of microhardness and electrical resistivity were used to study the response of Mg-4Y and Mg-4Y-1Ag alloys to isochronal or isothermal heat treatments. Hardening response and electrical resistivity annealing curves in these alloys were compared in order to investigate the effect of silver addition. Procedures for solid solution annealing and artificial aging of the Mg-4Y-1Ag alloy were developed. The corrosion rate of the as-cast and heat-treated Mg-4Y-1Ag alloy was measured by the mass loss method. It was found out that solid solution heat treatment, as well artificial aging to peak hardness, lead to substantial improvement in the corrosion properties of the Mg-4Y-1Ag alloy.
AB - Magnesium alloys are promising candidates for biodegradable medical implants which reduce the necessity of second surgery to remove the implants. Yttrium in solid solution is an attractive alloying element because it improves mechanical properties and exhibits suitable corrosion properties. Silver was shown to have an antibacterial effect and can also enhance the mechanical properties of magnesium alloys. Measurements of microhardness and electrical resistivity were used to study the response of Mg-4Y and Mg-4Y-1Ag alloys to isochronal or isothermal heat treatments. Hardening response and electrical resistivity annealing curves in these alloys were compared in order to investigate the effect of silver addition. Procedures for solid solution annealing and artificial aging of the Mg-4Y-1Ag alloy were developed. The corrosion rate of the as-cast and heat-treated Mg-4Y-1Ag alloy was measured by the mass loss method. It was found out that solid solution heat treatment, as well artificial aging to peak hardness, lead to substantial improvement in the corrosion properties of the Mg-4Y-1Ag alloy.
KW - Biodegradable implants
KW - Corrosion
KW - Heat treatment
KW - Magnesium alloys
KW - Engineering
UR - http://www.scopus.com/inward/record.url?scp=85011659696&partnerID=8YFLogxK
U2 - 10.3390/ma10010055
DO - 10.3390/ma10010055
M3 - Journal articles
C2 - 28772414
AN - SCOPUS:85011659696
VL - 10
JO - Materials
JF - Materials
SN - 1996-1944
IS - 1
M1 - 55
ER -