Objective
The present project, being realized by the partners from Seibersdorf (Austria), Dresden (Germany) and six partners from Russia, Ukraine and Uzbekistan, is focused on the investigation, development and medical application of nanostructured commercial pure (CP) Ti, Ti-6Al-4V ELI and shape memory TiNi alloys. The severe plastic deformation (SPD) methods, like High Pressure Torsion (HPT) and Equal Channel Angular Pressing (ECAP) will result in samples and billets of nanostructured bulk materials. The SPD processes will be varied to optimise the nanostructured state in the bulk ingots. Additional techniques to achieve higher materials performance will be used, such as further mechanical and thermal treatment. The structural, mechanical, corrosion, electrochemical and biological (biocompatibility) properties of the obtained new materials will be investigated.
THE FOLLOWING ACTIVITIES ARE PLANNED FOR ATTAINING THE PRESENTED GOALS
- Processing of bulk nanostructured Ti based alloys by using SPD methods (High Pressure Torsion - HPT and Equal Channel Angular Pressing - ECAP);
- Modelling and experimental investigation of influences of processing routes and regimes on microstructure and properties;
- Developing processing guidelines for SPD processed Ti based alloys;
- Investigations of the evolution of microstructure and phase transformations in nanostructured alloys by optical, SEM, TEM/HREM microscopy, X-ray diffraction and DSC measurements;
- Complex investigations of mechanical properties of the processed materials in as-prepared and annealed states;
- Establishing the relationship between structural features and extraordinary mechanical properties in SPD processed Ti based alloys;
- Electrochemical and corrosion behaviour of nanostructured and coarse grained Ti based alloys in biological media after static and cyclic loading;
- Fabrication of pilot medical implants or medical devices to study the processing abilities, like superplastic forming, of nanostructured Ti alloys.
THE FOLLOWING ENHANCED PROPERTIES ARE PLANNED TO BE ACHIEVED
- for CP Ti - yield stress more than 1000MPa in contrary to 450MPa; fatigue limit more than 500MPa in contrary to 230Mpa;
- for Ti-6Al-4V ELI - yield stress more than 1200 MPa in contrary to 850MPa; fatigue limit more than 700MPa in contrary to 500 Mpa;
- for TiNi - yield stress more than 1700MPa in contrary to 600MPa with an elongation after fracture of 30-50% at room temperature;
- Corrosion resistance and biocompatibility of nanostructured CP Ti and Ti-6Al-4V ELI alloy will be better than properties of well known applied materials for medical use based on Ti;
- The temperature of superplastic forming will be lowered and the strain rate significantly increased.
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Programme(s)
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Funding Scheme
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Coordinator
2444 Seibersdorf
Austria
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.