Hillert Symposium on Thermodynamics and Kinetics of
Migrating Interfaces in Steels and Other Complex Alloys
Foreword
Thefollowing 12 articles havebeen selected from papers that were presented at aspecial symposium to celebrate Professor
MatsHillert on his 80th birthday.The symposium was held at the Royal Institute of Technology in Stockholm, December
2–3, 2004. Approximately 100 researchers from academia and industry participated. The topic had been suggested by Matsas
‘‘...to somehowsum up our position internationallyconcerning the state of aphase interface during aphase transformation.
In particularquest ions on deviation from local equilibrium,para-equilibrium and other difficult issues shouldbeaddressed’’.
This was indeed an exciting topic! The response in the scientific community was enthusiastic.
This topic, which has been discussedfor morethan half acentury,and has played avery important role in Mats’ remarkable
scientific career,has gained arenaissance.During the lastfew yearsmany papershavebeen published covering itsvarious
aspects. There are three major reasons for thisnew interest:
d
Novel processing routes of steels and other advanced materials require detailed knowledge beyond what can be found in
traditional phase diagrams and thermodynamiccalculations.
d Newexperimental facilities, e.g.3D-APFIM, hold promises of establishing the local state of phase interfaces.
d
Newtheoretical development, e.g.based on solute-dragtheory and phase-field, allowaccount for theseeffects in
simulations.
Theselection of articlesinthis issue of Metallurgicaland Materials Transactions A serve as astarting point for scientific
discussions and give directionsfor future researchinthe field. Hopefully that researchwill soon lead to afull understanding
of these intriguing and important phenomena .
Drs. A. Borgenstam, M. Selleby,and Professors B. Sundman and B. Uhrenius are gratefully acknowledgedfor all their efforts
with the symposium.
John
A
˚
gren
METALLURGICAL AND MATERIALS TRANSACTIONS AVOLUME 37A, JUNE 2006—1701
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