Community Research and Development Information Service - CORDIS

Periodic Report Summary 1 - MIDAS (Micro and Nanoscale Design of Thermally Actuating Systems)

The main objectives of the MIDAS project, identified within the framework of the FP7- IRSES Call are:
1. To set-up a network of collaborative applied research between partners involved in complementary activities with the aim to develop actuating materials and applications.
2. To explore novel paths for enhancing the functionality of thermally actuated materials belonging to the shape memory alloy group. The use of a knowledge diversity related to the formation and fields is expected to be the driving force in the effort to find new paths.
3. To identify innovative ideas worth to be considered by private companies for the development and optimization of novel applications.
4. To provide a framework for optimal transfer of knowledge between the partners and between generations of scientists via adequately tailored exchange programs for each type of exchange beneficiary.
5. To generate a proper environment for interaction with private entrepreneurs interested in exploiting the results of the research collaboration.
6. To provide knowledge to be shared in educational activities as well as for dissemination of information to other socio-economical actors and
7. To favor the collaboration and its expansion even beyond the funding provided by this call, via new joint grant applications, publications or conferences and seminars.
Concerning the Structural optimization by Mechanical Alloying (MA) WP, experiments concerning the mechanical alloying of Ni+Ti2Ni powders for the production of NiTi materials were performed during the collaboration between the partners.
The collaboration in the WP Micro and nanoscale characterization (CHR) WP resulted in: the study of the acoustic properties of porous NiTi alloys prepared by SHS (Self-propagating High-temperature Synthesis) method and TLPS (Transient Liquid Phase Synthesis), the study of the internal friction (damping), at low and high frequencies, of porous NiTi alloys, the study of the anelastic properties of Ni-rich NiTi alloys with gradient phase transition prepared by non-equilibrium heat treatment or the study of the relaxations of sandwich-structured NiTi alloys prepared by doping with Carbon, Boron and Nitrogen.
Experiments in the Welding and joining techniques for smart materials (WJ) WP have been performed on what concerns the welding of NiTi and Cu-Al-Mn shape memory alloys in different configurations and the evaluation of the Nd:YAG pulsed laser welding effects on the microstructural and mechanical behavior of quasidisimilar NiTi joints made out of pseudoelastic and shape memory wires and the way the individual behavior of each wire is transposed in the resulting joint.
In terms of Applicative design (AD) WP5 , the activity was focused the design of models for the prediction of thermally-controlled actuation for shape memory alloy film-based bimorph cantilevers. The model is based on the temperature dependence of the thermal expansion coefficient and Young’s modulus in the film, as well as determination of the thermal evolution of the martensite and austenite phases; with the materials constants (including those of the substrate), the temperature dependence of the phase composition in the film during the forward and reverse martensitic transformation (both alloy composition and structural state sensitive). According to national programs the researchers of RAS have carried out the series of experiments on SMA based bimorph composite Ti2NiCu/Pt «nanotweezers» manufactured by focused ion beam (FIB) milling and FIB-induced CVD.

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