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22D38 - Crystal defects

Course specification
Course titleCrystal defects
Acronym22D38
Study programmeMetallurgical Enginering
Module
Lecturer (for classes)
Lecturer/Associate (for practice)
    Lecturer/Associate (for OTC)
      ESPB5.0Status
      ConditionОблик условљености
      The goalThe aim of this course is acquiring knowledge about fundamental properties of crystal defects – point, line (dislocations) and planar (interfaces and grain boundaries) - and their effect on materials properties and behavior.
      The outcomeThe expectation is that the acquired knowledge will enable students to develop an understanding of the role of crystal defects in mechanisms of plastic deformation, phase transformations and recrystallization as well as provide a base for the higher-level courses in physical and mechanical metallurgy.
      Contents
      Contents of lecturesPoint defects: definition and types; Formation energy and equilibrium concentration; Solid state diffusion; The effect on physical properties. Dislocations: Crystal growth and plasticity; Geometric aspects: edge, screw and mixed dislocations; Burgers vector; Elastic properties; Dislocation energy: thermodynamics, partial dislocations – unit dislocation dissociation and stacking faults; Dislocation motion: glide, climb and cross-slip. Dislocation interaction and dislocation sources. Characterization of dislocations – experimental techniques. Planar defects: Surface and interface energy; Anisotropy; Equilibrium crystal shape: Wulff plot; Interface structure: crystallography, models and experimental evidence; Interface phases and transitions; Crystallography and structure of grain boundaries; Grain boundary classification; Grain boundary energy; Grain boundary and interfacial defects; Mobility and mechanisms of interface and grain boundary migration.
      Contents of exercises
      Literature
      1. A. Kelly, K.M. Knowles, Crystallography and crystal defects, 2nd ed., Wiley
      2. P.M. Anderson, J.P. Hirth, J. Lothe, Theory of Dislocations, 3rd ed., Cambridge University Press.
      3. A.P. Sutton, R.W. Balluffi, Interfaces in Crystalline Materials, Oxford Science Publications
      Number of hours per week during the semester/trimester/year
      LecturesExercisesOTCStudy and ResearchOther classes
      3
      Methods of teachingLectures,homework.
      Knowledge score (maximum points 100)
      Pre obligationsPointsFinal examPoints
      Activites during lectures30Test paper
      Practical lessonsOral examination70
      Projects
      Colloquia
      Seminars