Control of Microstructure

School of Metallurgy & Materials, School of Metallurgy and Materials

College of Engineering and Physical Sciences


Code 17186

Level of study Third/Final year

Credit value 10

Semester 1

Module description

The module covers the following topics:

  • Modelling approaches to microstructure and properties - regression, Monte Carlo, neutral net, cellular automata, FE and analytical

  • Quantitative descriptions of nucleation and growth rates for diffusional and displacive transformations

  • Dependence of isothermal transformation rates and TTT curve behaviour on composition, temperature and nucleation site density

  • Overall transformation rate behaviour (JMAK) description

  • Driving forces for grain size control during cold working and annealing processes

  • Description of crystallographic texture, its measurement and its effects on properties (mechanical and physical)

  • Examples of control of microstructure in metallic and ceramic systems for isothermal processing steps - drawable sheet steels, aluminium canstock, transformer steels, isothermal sintering of ceramic compacts - and their effects on properties

  • Microstructural developing during continuous cooling

  • CCT behaviour, its relation to TTT diagrams and its dependence on composition, temperature and prior state

  • Examples of control of microstructure during continuous cooling situations - crystallisation of polymers, ferrous weldmetals (including acicular ferrite and HAZs) and aluminium-based alloy weldments (including FSW) - with effects on properties