Influence of stress on the degradation behavior of Mg LAE442 implant systems

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Denkena, B.; Köhler, J.; Stieghorst, J.; Turger, A.; Seitz, J.; et al.: Influence of stress on the degradation behavior of Mg LAE442 implant systems. In: Procedia CIRP 5 (2013), S. 189-195. DOI:

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Sum total of downloads: 252

In this paper the performance of a magnesium based implant system is analyzed. A special emphasis is placed on the impact of stress on the corrosion behavior of the magnesium alloy. An implant system containing a plate and 4 corresponding screws is machined from Mg LAE442. Its corrosion behavior is tested in-vivo in New Zealand White Rabbits for 6 and 12 weeks of implantation. The plate is monocortically fixated on the medial tibia. At the interface between screw and plate increased corrosion is observed. This phenomenon is stronger on the caudal side of the screw. Parallel to the in-vivo test the influence of stress load on the corrosion rate is analyzed for LAE442 in in-vitro tests. Compressive load is applied on cylindrical specimens in axial direction and the corrosion rate is measured in 0.9 wt% NaCl solution by eudiometry and mass loss. Additionally rectangular samples are bent to apply tensile stress on the surface. A drop of 5 wt% NaCl is deposited on the surface and the corrosion is evaluated by microscopic images. It is shown that stress essentially influences the corrosion rate. While tensile stress decreases the corrosion, compressive stress leads to higher corrosion rates.
License of this version: CC BY-NC-ND 3.0 Unported
Document Type: Article
Publishing status: publishedVersion
Issue Date: 2013
Appears in Collections:Fakultät für Maschinenbau

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pos. country downloads
total perc.
1 image of flag of Germany Germany 178 70.63%
2 image of flag of China China 26 10.32%
3 image of flag of United States United States 15 5.95%
4 image of flag of Russian Federation Russian Federation 8 3.17%
5 image of flag of India India 5 1.98%
6 image of flag of No geo information available No geo information available 2 0.79%
7 image of flag of Pakistan Pakistan 2 0.79%
8 image of flag of Hungary Hungary 1 0.40%
9 image of flag of Egypt Egypt 1 0.40%
10 image of flag of Switzerland Switzerland 1 0.40%
    other countries 13 5.16%

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