Grain boundaries are a main feature of crystalline materials. They
play a key role in determining the properties of materials,
especially when grain size decreases and even more so with the
current improvements of processing tools and methods that allow us
to control various elements in a polycrystal. This book presents
the theoretical basis of the study of grain boundaries and aims to
open up new lines of research in this area. The treatment is light
on mathematical approaches while emphasizing practical examples;
the issues they raise are discussed with reference to theories. The
general approach of the book has two main goals: to lead the reader
from the concept of 'ideal' to 'real' grain boundaries; to depart
from established knowledge and address the opportunities emerging
through "grain boundary engineering", the control of morphological
and crystallographic features that affect material properties. The
book is divided in three parts: I 'From interganular order to
disorder' deals with the concept of the perfect grain boundary, at
equilibrium, and questions the maintenance of its crystalline
state. II 'From the ideal to the real grain boundary' deals with
the concept of the faulted grain boundary. It attempts to reveal
the influence of the grain boundary structure on its defects, their
formation and their accommodation. III 'From free to constrained
grain boundaries' is devoted to grain boundary ensembles starting
from the triple junction (the elemental configuration) to real
grain boundary networks in polycrystals This part covers a new and
topical development in the field. It presents for the first time an
avenue for researchers working on macroscopic aspects, to approach
the scale of description of grain boundaries. Audience: graduate
students, researchers and engineers in Materials Science and all
those scientists pursuing grain boundary engineering in order to
improve materials performance.
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