Objective
The Action was proposed with the general goal of reducing considerably the major experimental effort required in the design of new light-alloy materials, by providing a thermodynamic database for alloy design that permits relatively inexpensive and rapid calculation of the phase constitution to be expected in a particular multi-component alloy under defined operational conditions.
Computer calculations, made in combination with a much more limited number of experimental measurements, will assist research scientists and development engineers dealing with a broad range of aluminium, titanium and magnesium alloys.
Current status
In 1989 four working groups were established to share the work. Group A to cover experimental studies ; Group B to provide critical evaluation of past and recently published constitutional data ; Group C to assess thermochemical data with subsequent calculation of phase equilibria ; and Group D to cover the collection of thermophysical data of relevant alloys. Round I of the Action is complete and Round II will end in June 1997. The progress within the groups can be summarised as follows :
Group A
COST 507-Round II started in Group A with two new research partners within a total of fourteen participating research laboratories. Experimental work in general and key experiments in particular were defined at two co-ordination meetings (Stuttgart, Genoa) for each of the six key alloy systems. First experimental results were collected by the key system managers, providing the efficient interlinking among those research laboratories of the COST 507 groups that are responsible for data for particular key alloy systems.
Group B
COST 507-Round II started in Group B with 10 projects contributing to the critical evaluation of data reliably known from published experimental work, to provide a starting base for experiments and thermodynamic calculations in COST 507. The goal is the critical assessment of the full body of metallurgical and phase-diagram data of all ternary alloys systems that are comprised in COST 507. This routinely covers all literature published since 1935. Within the individual publications it comprises all data that help to identify the phases occurring in these ternary systems and all data that can give information on the regime of phases that coexist when temperatures change or when the concentrations of the constituting elements are altered. "Critical assessment", in the present context, means to prove or disprove the consistency of the data in the light of the full available knowledge. The assessment of the reported findings has to take into account the precision and applicability of the chosen experimental procedure. It has to evaluate the conclusions drawn from these literature data as well as their compatibility with the phase configurations in the edge binary systems.
Over 900 papers on ternary systems were identified from the world literature as being relevant to the multicomponent alloy systems in COST 507. All literature handling, data management, reviewing and steering of the evaluations is centrally organised by project D12. The scientific work of evaluating the enormous amount of individual data and figures is shared with the partner projects and with colleagues from MSIT, a world-wide co-operating network of materials scientists co-ordinated by D12.
Group C
Excellent progress has been made during 1995/96 and the systems evaluated by Group C partners in the first Round of the Action have been made available by the database manager, Dr. Ansara, in a standardised computer form. Evaluated coefficients for some 70 binary and 20 ternary systems allow phase equilibria and thermodynamic properties to be calculated for the systems concerned for defined compositions and temperatures. A printed version of the database is already available, presenting the evaluated coefficients, calculated phase diagrams, references to experimental data used and information on the models used to describe the different crystallographic structures.
The current COST 507 database is already in use, for example by the European aluminium industry for model alloy work, where a knowledge of equilibrium conditions is a prerequisite for kinetic analyses of solidification, homogenisation and annealing, and the titanium-aluminide data have enabled Rolls-Royce plc to design and understand the process/microstructure relationships in low-density turbine blades for applications in modern civil turbofan engines.
Group D
The programme in the framework of Round II is being carried out mainly by three research groups, D9, GR2 and S1. A list of experimental work areas has been determined in collaboration with industrial partners, including Al-Si-Cu-Mg-Ni and Ti-Al-V alloys.
Measurements include those of thermal conductivity and heat capacity, electrical resistivity and DSC determinations. A thermophysical properties database for light metal alloys has been established.
Fields of science (EuroSciVoc)
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Programme(s)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Topic(s)
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Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
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Funding Scheme
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Coordinator
1049 Brussels
Belgium
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Participants (24)
8212 Neuhausen am Rheinfall
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5300 Bonn 2
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38042 Grenoble
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38340 Voreppe
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SW1W 9SS London
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52425 JUELICH
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02150 Espoo 15
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1050 Brussels
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57283 Maizières les Metz
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10044 Stockholm
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3001 Heverlee
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70174 STUTTGART
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38500 Volos
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70569 Stuttgart
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2500 EC Den Haag
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0801 Oslo 8
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TW11 0LW Teddington
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92322 Châtillon
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5100 Aachen
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0314 Oslo 3
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4719 Braga Codex
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4099 Porto Codex
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38334 Volos
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16126 Genova
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