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Definition of thermochemical and thermophysical properties to provide a database for the development of new light alloys

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Thermochemical database for light metal alloys
Industrial research and development

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COST
European cooperation
in the field of scientific
European Commission and technical research
COST 507
Definition of thermochemical and
thermophysical properties to provide a
database for the development
of new light alloys
Thermochemical database for
light metal alloys
Volume 2
EUR 18499 EN EUROPEAN COMMISSION
Edith CRESSON, Member of the Commission
responsible for research, innovation, education, training and youth
DG XII/B.1 — RTD actions: Cooperation with non-member countries
and international organisations — European Economic Area, COST,
Eureka and international organisations
Contact: Mr Peter Lobotka
Address: European Commission, rue de la Loi 200 (SDME 1/44),
B-1049 Brussels — Tel. (32-2) 29-65512; fax (32-2) 29-65925 COST
European cooperation
in the field of scientific
European Commission and technical research
COST 507
Definition of thermochemical and
thermophysical properties to provide a
database for the development
of new light alloys
Thermochemical database for
light metal alloys
Volume 2
Edited by
Ansara, A. T. Dinsdale, M. H. Rand
July 1998
EUR 18499 EN LEGAL NOTICE
Neither the European Commission nor any person acting on behalf of the Commission
is responsible for the use which might be made of the following information.
A great deal of additional information on the European Union is available on the Internet.
It can be accessed through the Europa server (http://europa.eu.int).
Cataloguing data can be found at the end of this publication.
Luxembourg: Office for Official Publications of the European Communities, 1998
Volume 2: ISBN 92-828-3902-8
Volumes 1 to 3: ISBN 92-828-3900-1
© European Communities, 1998
Reproduction is authorised provided the source is acknowledged.
Printed in Belgium COST 507
COORDINATION GROUP C
Final Report Round 2
July 1998
Partners in Coordination Group C, whose results are presented in the pages of
this report, are:
Lehrstuhl für Theoretische Hüttenkunde und Metallurgie der
Kernbrennstoffe, RWTTI Aachen, Germany
Max-Planck-Institut für Mctallforschung, PML, Stuttgart, Germany
Laboratoire de Thermodynamique et Physico-Chimie Métallurgiques,
INPG - ENSREG, St.Martin - d'Hères, France
Istituto di Chimica Generale, Università di Genova, Genova, Italy
Senter for Industriforskning, Blindem, Oslo, Norway
Division of Physical Metallurgy, Royal Institute of Technology, Stockholm,
Sweden
Laboratory of Materials Processing and Powder Metallurgy,
Helsinki University of Technology, Espoo, Finland
Centre for Materials Measurement and Technology, National
Physical Laboratory, Teddington, U.K.
Institut für Physikalische Chemie, Universität Wien, Austria
GTT - Technologies, Herzogenrath, Germany INTRODUCTION
The COST-Action 507 has the official title:
Measurement and Evaluation of Thermochemical and Thermophysical
Properties to Provide a Database for the Development of New Light
Alloys
There are 14 signatory countries to the Action, which had an official commence­
ment date on January 1, 1990.
The countries concerned are:
Austria Germany Norway Switzerland
Belgium Greece Portugal United Kingdom
France Italy Spain
Finland Netherlands Swede
In addition, the Baikov Institute of Metallurgy, Moscow (Russia) is taking part
in the Action.
The work of COST 507 is shared amongst partners in 4 Coordination Groups
whose areas of interest are:
Coordination Group A : Experimental measurement of thermochemical
properties
Coordination Group Β : Critical compilation and assessment of constitutional
data prior to thermodynamic calculation
Coordination Group D : Experimental measurement and compilation of
thermophysical data
Coordination Group C, whose work is presented in this report, is concerned with
the general theme:
Critical thermodynamic evaluation of relevant binary, ternary and higher-order
alloy systems to produce a set of optimized coefficients for the light metal alloy
database.
The evaluations of Group C incorporate experimental data from Group A and
Group D partners, and use the critically compiled constitution data from Group Β
as basis for the evaluation work. Using this computer database, which is now in an impressive state of develop­
ment, it will be possible to calculate the phase equilibria to be expected in complex
light alloy systems as a function of a wide range of compositions and temperatures.
For example calculation can be made of liquidus and solidus temperatures, crystal­
lization paths for equilibrium and non-equilibrium conditions, nature and amounts
of precipitated phases, enthalpy effects associated with phase transformations, etc.
The rapid accessibility of such information will considerably assist the design,
manufacture and utilization of a wide range of different alloy types.
The alloy systems towards which the experimental and evaluation work is being
directed, together with some major applications, are listed below:
Al-Mg-Mn-Fe-Si : cans
Al-Mg-Si-Cu (-Fe) extrusions, automobiles
Al-Zn-Cu-Mg (-Zr,Cr,rare earth metals) : aerospace, transport
Al-Li-Cu-Mg-Zr (-II) : airframes
Ti-Al-Mo-Zr (Cu,B,C,N,0,Si) gas turbines
Ti-ΑΙ (-V,Cr,Mn,Ni,Fe,Nb), (B,C,N,0,Si) : gas turbines
EVALUATION PROCEDURE
Bearing in mind the alloy categories defined by industrial partners at the begin­
ning of the Action, a matrix was drawn up to define the binary systems forming the
building blocks for the evaluation of higher-order systems. These binaries were then
allocated to the different partners in Group C for evaluation.
All partners made use of the selected data for the elements published by A.T.
Dinsdale ' on behalf of SGTE.
There was also agreement amongst partners with respect to the modelling of par­
ticular phases so that consistency could be maintained on proceeding from binary to
higher-order systems combining evaluations originating from different laboratories.
All results were prepared in exactly the same format to facilitate exchange of data
and to provide a standard format for computer storage of the data by the database
manager, Dr.Ansara, in Grenoble.
Evaluations to produce optimized sets of coefficients were carried out using one or
'A.T. Hinsdale, Calphad, 15, 4, 317-425 (1991).