scholarly journals Biodegradation and Mechanical Integrity of Magnesium and Magnesium Alloys Suitable for Implants

Author(s):  
S. Gonzlez ◽  
E. Pellicer ◽  
S. Suriach ◽  
M.D. Bar ◽  
J. Sort
2014 ◽  
Vol 783-786 ◽  
pp. 1269-1273
Author(s):  
Mathan Bobby Kannan

Magnesium alloys are attractive for use as biodegradable materials for temporary implant applications. However, the high localized degradation of magnesium alloys in physiological conditions is a major concern, which can affect the mechanical integrity of the implant during service. Calcium phosphate (CaP) coating is a suitable method to delay the initiation of localized attack in magnesium alloys. This paper will discuss the challenges and opportunities in electrochemically coating CaP on magnesium and its magnesium alloys for biodegradable implant applications.


Author(s):  
Kulwant Singh ◽  
Gurbhinder Singh ◽  
Harmeet Singh

The weight reduction concept is most effective to reduce the emissions of greenhouse gases from vehicles, which also improves fuel efficiency. Amongst lightweight materials, magnesium alloys are attractive to the automotive sector as a structural material. Welding feasibility of magnesium alloys acts as an influential role in its usage for lightweight prospects. Friction stir welding (FSW) is an appropriate technique as compared to other welding techniques to join magnesium alloys. Field of friction stir welding is emerging in the current scenario. The friction stir welding technique has been selected to weld AZ91 magnesium alloys in the current research work. The microstructure and mechanical characteristics of the produced FSW butt joints have been investigated. Further, the influence of post welding heat treatment (at 260 °C for 1 h) on these properties has also been examined. Post welding heat treatment (PWHT) resulted in the improvement of the grain structure of weld zones which affected the mechanical performance of the joints. After heat treatment, the tensile strength and elongation of the joint increased by 12.6 % and 31.9 % respectively. It is proven that after PWHT, the microhardness of the stir zone reduced and a comparatively smoothened microhardness profile of the FSW joint obtained. No considerable variation in the location of the tensile fracture was witnessed after PWHT. The results show that the impact toughness of the weld joints further decreases after post welding heat treatment.


2018 ◽  
pp. 27-31
Author(s):  
I.A. Gvozdkov ◽  
◽  
V.A. Belyaev ◽  
S.N. Potapov ◽  
V.N. Verbetsky ◽  
...  
Keyword(s):  

2015 ◽  
Vol 57 (2) ◽  
pp. 126-130
Author(s):  
Dorothea Amberger ◽  
Tina Blickle ◽  
Heinz Werner Höppel ◽  
Mathias Göken

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