Cyclic deformation of newly developed magnesium cast alloys in corrosive environment
Research output: Contributions to collected editions/works › Article in conference proceedings › Research › peer-review
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Light Metals Technology V. ed. / Hajo Dieringa; Norbert Hort; Karl Ulrich Rainer. Trans Tech Publications Ltd, 2011. p. 495-498 (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 - Cyclic deformation of newly developed magnesium cast alloys in corrosive environment
AU - Maier, Petra
AU - Anopuo, Okechukwu
AU - Malchau, Frank
AU - Wienck, Gunnar
AU - Hort, Norbert
PY - 2011
Y1 - 2011
N2 - The moderate corrosion rate exhibits by Mg-RE alloys make it candidate material for biodegradable implant. Owing to the operating environment, implants are subjected to stochastic cyclic load and chemical condition. The alloys response to the subjected condition determines its degree of applicability. This work studies the cyclic deformation of newly developed Mg10GdxNd alloys both in air and under corrosive environment. The corrosion fatigue test was carried out in Ringer-Acetate solution and was evaluated using mechanical hysteresis and pH-value measurements. The microstructural changes in correlation to the deformation parameters and fracture surfaces were characterized using SEM. Results show that alloying Mg10Gd with Neodymium improved its fatigue live both in air and corrosive medium. Chilled casted Mg10Gd and Mg10GdxNd were found to undergo brittle fracture in both media. Loading in Ringer-Acetate was found to reduce the fatigue life of the investigated alloys due to the interaction of corrosion and fatigue processes on the microstructure of the alloys. EDX analysis suggests that the improved fatigue life observed on the Mg10GdxNd is connected to the new ternary Mg-Gd-Nd phase observed in the microstructure.
AB - The moderate corrosion rate exhibits by Mg-RE alloys make it candidate material for biodegradable implant. Owing to the operating environment, implants are subjected to stochastic cyclic load and chemical condition. The alloys response to the subjected condition determines its degree of applicability. This work studies the cyclic deformation of newly developed Mg10GdxNd alloys both in air and under corrosive environment. The corrosion fatigue test was carried out in Ringer-Acetate solution and was evaluated using mechanical hysteresis and pH-value measurements. The microstructural changes in correlation to the deformation parameters and fracture surfaces were characterized using SEM. Results show that alloying Mg10Gd with Neodymium improved its fatigue live both in air and corrosive medium. Chilled casted Mg10Gd and Mg10GdxNd were found to undergo brittle fracture in both media. Loading in Ringer-Acetate was found to reduce the fatigue life of the investigated alloys due to the interaction of corrosion and fatigue processes on the microstructure of the alloys. EDX analysis suggests that the improved fatigue life observed on the Mg10GdxNd is connected to the new ternary Mg-Gd-Nd phase observed in the microstructure.
KW - Corrosion
KW - Cyclic deformation
KW - Fatigue
KW - Microstructure
KW - Rare earth
KW - Engineering
UR - http://www.scopus.com/inward/record.url?scp=79960401505&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/MSF.690.495
DO - 10.4028/www.scientific.net/MSF.690.495
M3 - Article in conference proceedings
AN - SCOPUS:79960401505
SN - 9783037851807
T3 - Materials Science Forum
SP - 495
EP - 498
BT - Light Metals Technology V
A2 - Dieringa, Hajo
A2 - Hort, Norbert
A2 - Rainer, Karl Ulrich
PB - Trans Tech Publications Ltd
ER -