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Meeting 2016 TMS Annual Meeting & Exhibition
Symposium Magnesium-based Biodegradable Implants
Presentation Title Influence of Precipitation Hardening in Mg-Y-Nd on Mechanical and Corrosion Properties
Author(s) , Raimund Peters, Chamini Mendis, Sören Müller, Norbert Hort
On-Site Speaker (Planned)
Abstract Scope Precipitation hardening in Mg-RE alloys is an effective strengthening mechanism to achieve high strength at moderate ductility. However, improved mechanical properties can affect corrosion by finely dispersed particles often being more noble than the matrix. Biodegradable implant material should show a certain corrosion rate, but should be free of pitting. Deep pits are notches causing higher mechanical stress concentration. WE43 has already shown an acceptable biological response. In this study a Mg-Y-Nd-Gd-Dy (WE32) alloy in extruded, solution and precipitation heat treated conditions has been investigated. Solution heat treatment causes grain growth and strength loss. A rather short ageing response is found, where peak hardening causes hardness values exceeding the initial extruded condition. Grain growth during ageing is not significant. Corrosion has been evaluated with potentiodynamic polarization in Ringer solution. The highest corrosion rate is found in the supersaturated a-phase. The peak aged alloy shows the most homogenous form of corrosion.
Proceedings Inclusion? Planned: A combination print-CD volume


Absorbable Filament Technologies: Wire-drawing to Enable Next-generation Medical Devices
Appropriate Corrosion-FatigueTesting of Magnesium Alloys for Temporary Bio-implant Applications
Computer Simulation of the Mechanical Behaviour of Implanted Biodegradable Stents in a Remodelling Artery
Degradation of MgF2-coated and Uncoated MgNd2 Specimens in Contact with Nasal Mucosa
Fabrication, Testing and Performance of Rare Earth-containing Magnesium Biodegradable Metals
In Vitro Corrosion and Cytocompatibility Properties of Mg-2Gd-X(Ag, Ca) Alloys
Influence of Precipitation Hardening in Mg-Y-Nd on Mechanical and Corrosion Properties
Magnesium-based Compression Screws
Magnesium Powder Injection Molding (MIM) of Orthopedic Implants for Biomedical Applications
Manufacturing of Osteosynthesis Systems Made of Magnesium Alloy AZ91
Monitoring Biodegradation of Magnesium Implants with Sensors
Plasma Surface Modification of Magnesium-Based and Related Biomaterials
Standardized Guidance for the Preclinical Evaluation of Absorbable Metal Implants
The Industrial Challenges of Manufacturing Bioabsorbable Magnesium
Understanding Corrosion-assisted Cracking of Magnesium Alloys for Bioimplant Applications

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