JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Course Objective

This course is mainly designed to provide knowledge about various metal

forming operations, their process parameters, and mathematical equations associated with the process.

Course Outcome

The student will be able to solve problems on calculation of required

stress, extent of deformation in metal forming techniques.

UNIT - I

Stress and Strain Relationship for Elastic Behavior: Description of stress at a point. State of stress in two dimensions.Mohrs circle of stress in two dimensions, state of stress in three dimensions. Mohr’s circle of stress in three dimensions. Description of strain at point.

UNIT - II

Elements of Theory of Plasticity: The flow curve. True stress and true strain. Von Mises distortion energy criterion, maximum shear stress or Tresca criterion. Octahedral shear stress and shear strain. Basics of the theories of plasticity.

UNIT - III

Fundamentals of Metal Working: Classification of forming processes, Mechanics of metal working for slab method and uniform deformation energy method. Cold working, Recovery, recrystallisation and grain growth, hot working, Strain-Rate effects, Work of plastic deformation. Forging: Classification of forging processes, forging equipment. Forging in plane strain. Open-die forging, closed-die forging, Forging of a cylinder in plane-strain. Forging defects,.

UNIT - IV

Rolling of Metals: Classification of rolling process, rolling mills. Hot rolling, cold rolling, rolling of bars and shapes, forging and geometrical relationships in rolling. Simplified analysis of rolling load, rolling variables, problems and defects in rolled products. Theories of hot rolling, torque and horsepower, theories of cold rolling, torque and horsepower.

UNIT - V

Extrusion: Classification of extrusion processes, extrusion equipment. Hot extrusion. Deformation and defects in extrusion. Analysis of the extrusion process. Cold extrusion. Extrusion of tubing and production of seamless pipe and tubing. Drawing of Rods, Wires and Tube: rod and wire drawing, tube drawing processes, deep drawing, residual stresses in rod, wire and tubes.

R16 B.TECH METALLURGY AND MATERIALS ENGG.

TEXT BOOKS:

• 1. Mechanical Metallurgy by GE Dieter (3rd edition)
• 2. Technology of Metal Forming Processes – Surender Kumar PHI 2008

REFERENCES:

• 1. Mechanical Working of Metals - Avitzur.
• 2. Engineering Metallurgy – Part II - Higgins.
• 3. Mechanical Metallurgy - White and Lemay. R16 B.TECH METALLURGY AND MATERIALS ENGG.