Learning Objectives

Students are familiar with macroscopic, mesoscopic and microscopic mechanisms of plastic deformation in metals, alloys and intermetallics including the qualitative and quantitative descriptions. Furthermore, students can apply their knowledge in order to deduce and explain mechanism-property relationships in this kind of materials and their use in materials manufacturing.

Content

(i) Relevance of plasticity in industry and research

(ii) Macroscopic features of plastic deformation

(iii) Fundamentals and interrelations to other lectures:
- fundamental concepts of elasticity
- macroscopic strength and strengthening/hardening
- fundamentals of crystallography
- fundamentals of defects in crystalline solids

(iv) Dislocations:
- fundamental concept
- observation of dislocations
- properties of dislocations
- dislocations in fcc metals
- dislocations in bcc metals
- dislocations in hcp metals and complex intermetallics

(v) Single crystal plasticity
- influence of temperature, orientation, strain rate, etc. (fcc metals)
- further examples (entension of the results to bcc, hcp and intermetallic materials)
- deformation twinning

(vi) Polycrystalline materials

- transition from single crystals to polycrystals
- strength of polycrystals: solute atoms, dislocations (incl. dislocation patterning), grain boundaries, precipitates and dispersoids

(vii) Other mechanisms of plastic deformation
- deformation twinning, martensitic transformation, grain boundary sliding

(viii) Summary

Work Load

lectures: 56 h

private studies: 187 h

Powerpoint slides will be distributed via the ILIAS system.

Detailed information are available for different sub topics of the lecture:

P. Hirth, J. Lothe: „Theory of Dislocations“, Krieger (1992)
http://services.bibliothek.kit.edu/primo/start.php?recordid=KITSRC070938105

Hull, D. J. Bacon: „Introduction to Dislocations“, Elsevier (2011)
http://services.bibliothek.kit.edu/primo/start.php?recordid=KITSRC383083990 (free vie KIT license)

R.W. Cahn, P. Haasen (Editoren): „Physical Metallurgy“, Serie, North Holland (1996)
http://services.bibliothek.kit.edu/primo/start.php?recordid=KITSRC052463656

Freudenberger: „Skript zur Vorlesung Physikalische Werkstoffeigenschaften“, IFW Dresden (2004)
https://www.ifw-dresden.de/institutes/imw/events/lectures/lecture-notes/physikalische-werkstoffeigenschaften/ (public domain)

Details about the lecture are distributed via: https://www.iam.kit.edu/wk/english/studies.php