Lecture 05: Metal Machining-2: Mechanism of plastic deformation

This lecture covers the following concepts:
Mechanism of plastic deformation in atomic scale;
Slip lines and slip planes; Defects in crystallographic structure;
Elastic and plastic deformation in atomic scale;
The amount of Shear Stress necessary to effect the Slip;
Basic machining parameters; Cutting Tools & Types of Machining;
Orthogonal and oblique cutting; Types of chips.

Self-Assessment Questions:
What is the role of crystallographic structure defect in the metal deformation?
Why metal is plastically deformed along the slip line?
Why the amount of shear stress practically required for the deformation of metal is less than that of the theoretical one?
Why oblique cutting is preferred in practice?
Give an example of orthogonal machining?