The main purpose of this book is to put forward the fundamental role of grain boundaries in the plasticity of crystalline materials.

To understand this role requires a multi-scale approach to plasticity: starting from the atomic description of a grain boundary and its defects, moving on to the elemental interaction processes between dislocations and grain boundaries, and finally showing how the microscopic phenomena influence the macroscopic behaviors and constitutive laws.

It involves bringing together physical, chemical and mechanical studies. The investigated properties are: deformation at low and high temperature, creep, fatigue and rupture.

Louisette Priester is Emerita Professor at the Paris-Sud University, Orsay, France. She has published around 200 articles in journals and contributed to about 150 national and international conferences.