Schlüsselwörter
(Englisch)
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Intermetallic phases; aluminides; high temperature; hydrogen storage; phase diagrams; modelling; Heusler phase; magnetic properties
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Forschungsprogramme
(Englisch)
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COST-Action 535 - Thermodynamics of Alloyed Aluminides (THALU)
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Kurzbeschreibung
(Englisch)
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Intermetallic phases, such as Fe-Ni-Ti aluminides, possess many attractive structural and functional properties such as high-temperature strength, shape memory effect, large hydrogen storage, and large magnetization. The Fe-Ni-Ti system appears as an important ternary sub-system relevant to different materials: from steels and Ni-based superalloys to alloyed aluminides, from Ti-based corrosion-resistant alloys to shape memory alloys and amorphous materials. Fe-Ni-Ti also is a sub-system of the Al-Fe-Ni-Ti quaternary, the core system of COST 535 'THALU'. The proposed project is based on the collaboration of 5 partners. Two are European partners: the University of Genova (Italy) and Cirimat (Toulouse, France); and three are Swiss: the Paul Scherrer Institut (PSI), Empa Dübendorf, and the Laboratory of Metal Physics and Technology at the ETH Zurich (LMPT-ETHZ). The project will utilize the individual strengths of each partner, and has three primary objectives: (i) a more complete description of the ternary Fe-Ni-Ti system based on the priority list of COST535; (ii) screening of the quaternary Fe-Ni-Ti aluminide system using the diffusion couple technique and additional individual alloys; and (iii) to provide a basis for further investigation of the quaternary Fe-Ni-Ti-Al system. Because most intermetallics appear to be brittle, micro- or alloying resulting in a two- or three-phase structure looks promising in improving the ductility. To facilitate more efficient alloy design of Fe-Ni-Ti aluminides, quantitative data on phase stability and phase relations are necessary. Investigating these items would be the scope of the proposed project.
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Weitere Hinweise und Angaben
(Englisch)
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Full name of research-institution/enterprise: Eidg. Materialprüfungs- und Forschungsanstalt EMPA Abteilung Füge und Grenzflächentechnologie
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Partner und Internationale Organisationen
(Englisch)
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AT, BE, CH, CZ, DE, ES, FI, FR, IT, NL, PL, PT, RS, SE, TR, UK
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Abstract
(Englisch)
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Intermetallic phases, such as Fe-Ni-Ti aluminides, posses many attractive structural and funtional properties such as high-temperature strength, shape memory effect, large hydrogen storage, and large magnetization. The study of the quaternary Fe-Ni-Ti-Al phase diagram is therefore very important and interesting for high temperature applications, because this system is a link in between the most important alumindes (FeAl, NiAl and TiAl) and nickel and iron-based superalloys. The Fe-Ni-Ti-Al system is the core system of the COST 535 THALU and the Fe-Ni-Ti is one of the sub-systems importants for the quaternary. In this project, the isothermal sections of the Fe-Ni-Ti system at 800°C and 1000°C were determined. In addition the liquidus projection and the isopleth at 66.6 at.-% Ti were revised. In the Fe-Ni-Ti-Al system, isothermal sections at 800°C, 1000°C and 1100°C were determined.
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Datenbankreferenzen
(Englisch)
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Swiss Database: COST-DB of the State Secretariat for Education and Research Hallwylstrasse 4 CH-3003 Berne, Switzerland Tel. +41 31 322 74 82 Swiss Project-Number: C05.0031
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