Corrosion behavior of As-Cast binary Mg-Dy alloys
Research output: Contributions to collected editions/works › Article in conference proceedings › Research › peer-review
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Corrosion behavior of As-Cast binary Mg-Dy alloys. / Yang, Lei; Feyerabend, Frank; Kainer, Karl Ulrich et al.
Light Metals Technology V. ed. / Hajo Dieringa; Norbert Hort; Karl Ulrich Rainer. Trans Tech Publications Ltd, 2011. p. 417-421 (Materials Science Forum; Vol. 690).Research output: Contributions to collected editions/works › Article in conference proceedings › Research › peer-review
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TY - CHAP
T1 - Corrosion behavior of As-Cast binary Mg-Dy alloys
AU - Yang, Lei
AU - Feyerabend, Frank
AU - Kainer, Karl Ulrich
AU - Willumeit, Regine
AU - Hort, Norbert
PY - 2011/6
Y1 - 2011/6
N2 - The addition of rare earth elements (REE) is an effective way to improve the corrosion properties of magnesium alloys. Dysprosium has a very high solubility in Mg (25.3 wt.% at 561 °C) and could therefore be a promising alloying element for Mg based implants. In this study, four binary Mg-xDy (x=5, 10, 15 and 20 in wt.%) alloys were prepared by permanent mould direct chill casting. Microstructure and Dy distribution were investigated using optical microscope and EDX analysis. Corrosion rate was measured with hydrogen evolution method and corrosion morphology was observed after immersion for different time in 0.9 wt% NaCl solution with optical and SEM. The results show that with the increase of Dy, the amount of Dy in Mg matrix and area of Dy segregation are both increased. At the same time, the amount of second phase is also increased. Filiform corrosion is reduced while pitting corrosion is increased with the increment of Dy. As a result, lowest corrosion rate is obtained at Mg-10Dy alloy.
AB - The addition of rare earth elements (REE) is an effective way to improve the corrosion properties of magnesium alloys. Dysprosium has a very high solubility in Mg (25.3 wt.% at 561 °C) and could therefore be a promising alloying element for Mg based implants. In this study, four binary Mg-xDy (x=5, 10, 15 and 20 in wt.%) alloys were prepared by permanent mould direct chill casting. Microstructure and Dy distribution were investigated using optical microscope and EDX analysis. Corrosion rate was measured with hydrogen evolution method and corrosion morphology was observed after immersion for different time in 0.9 wt% NaCl solution with optical and SEM. The results show that with the increase of Dy, the amount of Dy in Mg matrix and area of Dy segregation are both increased. At the same time, the amount of second phase is also increased. Filiform corrosion is reduced while pitting corrosion is increased with the increment of Dy. As a result, lowest corrosion rate is obtained at Mg-10Dy alloy.
KW - Corrosion
KW - Dysprosium
KW - Magnesium alloy
KW - Microstructure
KW - Engineering
UR - http://www.scopus.com/inward/record.url?scp=79960391757&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/MSF.690.417
DO - 10.4028/www.scientific.net/MSF.690.417
M3 - Article in conference proceedings
AN - SCOPUS:79960391757
SN - 9783037851807
T3 - Materials Science Forum
SP - 417
EP - 421
BT - Light Metals Technology V
A2 - Dieringa, Hajo
A2 - Hort, Norbert
A2 - Rainer, Karl Ulrich
PB - Trans Tech Publications Ltd
ER -