Materials Science

(Prof. Dr.-Ing. Gunther Eggeler, Dr.-Ing. Pascal Thome, apl. Prof. Dr.-Ing. Jan Frenzel, Dr. rer. nat. Klaus Neuking, Prof. Dr. rer. nat. Gerhard Dehm)

The lecture covers the relations between the microstructure of materials and their properties. It starts with the discussion of the crystalline and amorphous nature of solids. The importance of lattice defects (vacancies, dislocations and internal interfaces) is highlighted. Basic thermodynamic and kinetic concepts that are needed to understand the evolution of microstructures are discussed. This requires a solid understanding of the physical interpretation of phase diagrams and of thermodynamic driving forces governing all reactions in and at solids. Diffusion processes play a key role in this respect and are discussed from a phenomenological (solutions of Fick’s second law) and from a fundamental point of view (physical background of atomic mobility). The basic concepts are applied to reactions of metals with gases, to the solidification of melts, to processes like the sintering of powder mixtures or precipitation processes from oversaturated solid solutions. Ostwald ripening, the coarsening of particle populations driven by interfacial energies, the segregation of impurity atoms to interfaces and the martensitic transformation also receive due attention. The second part of the lecture looks at the response of materials to mechanical loading. Elementary deformation and damage processes in engineering materials are discussed, after the fundamentals were introduced (elasticity, inelasticity, plasticity, recovery and recrystallization, creep, fracture mechanics, fatigue and wear). Throughout, the macroscopic mechanical behaviour is discussed on the basis of the underlying atomistic and microstructural processes.

The lecture is held in summer on Mondays/Wednesdays from 2:00 to 3:30 p.m / 1:00 to 2:30 p.m.

Lecture Announcement SS23:

00_Vorlesung_Werkstoffwissenschaft_SoSe 2023.pdf
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