This course explores the basic concept of thermomechanical processing of steel whereby the granular structure of steel is changed to meet desired properties.
Annealing-Related Phenomena
Full Code
MET0105215
Module Type
E-learning
Description
It is widely known that cold working strain changes the properties of most metals. When as rolled steel bars are cold worked by cold drawing through a die, a significant increase in yield and tensile strength is obtained. At the same time, the reduction in area and percent elongation are reduced. In this module cold working will be explained together with strain energy. Then, the dislocations and point defects will be explained and the definition of free energy will be presented.
Deformation of metal single crystals and policrystal will be treated in detail. Finally, resolved shear stress and Schmid factor will be introduced.
What you will learn
- Explain why some strain energy is stored within the material when a metal is cold worked;
- Describe the dislocation density;
- Explain the relation between shear strain vs resolved shear stress;
- Describe the theories of Kuhlmann-Wilsdorf and Seeger.
Module content
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