Course - Recrystallization and Texture - MT8216
Recrystallization and Texture
Lessons are not given in the academic year 2012/2013
About
About the course
Course content
The course is normally given every second year, next time will be autumn 2013.
The course is intended to give a comprehensive and detailed description of the evolution in microstructure and texture during thermomechanical processing of metals and alloys. Emphasis is on recrystallisation and related annealing phenomena of aluminium and aluminium alloys.
Topics that will be covered are: A detailed description of the deformed state after hot and cold deformation in terms of key microstructural features, stored energy (as driving force for recrystallisation), and deformation heterogeneties. Structural characteristics, energies and mobilities of grain boundaries. Recovery reactions; mechanisms and kinetics. Nucleation and growth of recrystallization; nucleation mechanisms and nucleation and growth kinetics. Recrystallization of two-phase alloys and grain size control. Evolution of texture during plastic deformation texture and subsequent annealing (recrystallization textures).
The topics will be presented through a "state-of-the-art" description on how these phenomena manifest themselves experimentally in view of microstructure, texture and properties and how they can be described/expalined by current theories and available models.
Learning outcome
After completed the course the students should have in-depth knowledge about phenomena and reactions during annealing of cold deformed metals, including relevant theories and mathematical models, with emphasis on the evolution of microstructure and texture in aluminium alloys, and how this is related to mechanical properties.
After completed the course the students should be able to:
Describe qualitatively and quantitatively the evolution in sub-structure and texture during plastic deformation of metals, e.g. during extrusion and sheet rolling.
Describe qualitatively and quantitatively the evolution in grain structure and texture during annealing of metals during plastic deformation through extrusion and sheet rolling.
Account for «state-of-the-art» theory and relevant mathematical models which describe the evolution in microstructure, texture and associated properties during recovery and recrystallisation.
Describe qualitatively and quantitatively the effects of volume fraction, size and spatial resolution of secondary phase particles on nucleation, kinetics, grain structure and texture during/after recrystallization.
Discuss, analyse and perform relevant quantitative calculations with respect to microstructure, texture and mechanical properties during annealing.
Suggest relevant mechanical and thermal treatments to achieve a desired microstructure and associated properties during thermo-mechanical processing of relevant materials for structural applications.
Learning methods and activities
The course will be organised as a combination of ordinary lectures, student colloquia and self studies.
Recommended previous knowledge
The course requires an adequate background in phyisical metallurgy, and it is preferential, although not abslolutely necessary with a background corresponding to the courses TMT4240 Microstructure and Properties of Metals and TMT4222 Mechanical Properties of Engineering Materials.
Course materials
Literature:
Selections from:
F.J. Humphreys and M. Hatherly: Recrystallization and Relating Annealing Phenomena plus lecture notes (selected topics).
Subject areas
- Physical Metallurgy
- Materials Science and Engineering
- Technological subjects