Plastic Deformation of Metals (2142106)  

Syllabus

Sr. Topics Teaching Hours Module Weightage
1
Elastic and Plastic Deformation

Elastic and plastic deformation of metallic materials. Stress-strain, yield phenomena for ductile. Ductile vs brittle behaviour.
Mohr's circle, Yielding criterion, Von-Mises and Maximum-shear-stress/Tresca yielding criterion, Failure criteria under combined stresses,

9
20 %
2
Plastic deformation of single crystals:

Lattice defects, Crystal Imperfection: Point defect, line defect & surface defects. Slip phenomena, slip systems, Slip by dislocation movement, concept of critical resolved shear stress, Twinning as mode of deformation, Stacking faults, Strain hardening of single crystal.

8
18 %
3
Plastic deformation of poly crystalline material

Grain boundaries & deformation, strengthening from grain boundaries, strain hardening of poly crystalline materials. Strengthening Mechanism of metals.

8
18 %
4
Dislocation theory:

Burger vector and dislocation loop. Dislocation in FCC (Including formation of Stacking faults) BCC & HCP, stress field of dislocations, forces on dislocation, forces between dislocation motions of dislocations, dislocation climb. Jogs in dislocations. Sources, Multiplication of dislocations-Frank Reed source. Techniques of observation of dislocation.

10
22 %
5
Annealing of cold worked metals, Recovery, Recrystallization and grain growth.
Annealing of cold worked metals, Recovery, Recrystallization and grain growth.
3
6 %
6
Fracture behaviour of metals:

Types of fracture in metals, theoretical cohesive strength of metals, Griffith theory of brittle fracture. Theory of ductile brittle transition temperature. Concept of Fracture Mechanics

7
16 %