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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.
Grain boundaries are important structural components of polycrystalline materials used in the vast majority of technical applications. Because grain boundaries form a continuous network throughout such materials, their properties may limit their practical use. One of the serious phenomena which evoke these limitations is the grain boundary segregation of impurities. It results in the loss of grain boundary cohesion and consequently, in brittle fracture of the materials. The current book deals with fundamentals of grain boundary segregation in metallic materials and its relationship to the grain boundary structure, classification and other materials properties.
Continuing the scope of the preceding Conferences on Intergranular and Interphase Boundaries in Materials, the present conference focused on the atomic-level modeling of interfaces, the structural and chemical characterization of internal interfaces, on their thermodynamic, kinetic, mechanical, electrical, magnetic behavior and high-Tc superconductivity, and on the application of current knowledge to the design of polycrystalline materials having improved properties. Particular attention was paid to non-equilibrium segregation in irradiated materials.