Subject Code: ML3L008 Name: Deformation and mechanical working of materials L-T-P: 3-0-0 Credit: 3
Pre-requisites: Mechanical properties and testing of materials
Introduction to deformation behaviour: Concept of stresses and strains; engineering stresses and strains; different types of loading and temperature encountered in applications; Review of theory of plastic deformation; Introduction to viscoplastic deformation
Deformation at high temperature: Time dependent deformation - creep; different stages of creep; creep and stress rupture; creep mechanisms and creep mechanism maps; creep under multi-axial loading; microstructural aspects of creep and design of creep resistant alloys; high temperature deformation of ceramics and polymers
Fundamentals of metal working: Classification of forming processes, mechanics of metal working, temperature and strain rate effects, instability and flow localization, shear banding, workability, microstructure and texture evolution, friction and lubrication, residual stress. Forging: Closed-die and open-die forging, forging equipment, mechanics.
Rolling: Terminology of rolled products, different kinds of rolling mills, forces and
geometric relationships, variables affecting roll pressure, power and friction, theories of cold and hot rolling, roll pass design.
Extrusion: Direct and indirect extrusion, impact extrusion, hydrostatic extrusion, equipment,
extrusion variables, extrusion pressure.
Wire and tube drawing: Processes and equipments, hydrodynamic lubrication, draw stress, factors affecting draw stress and reduction. Sheet metal forming: Different forming methods, forming limit criteria
Non-conventional methods: Powder performs forging, superplastic forming, high energy rate forming, mushy state forming, forming of plastics.
Text/Reference Books:
  1. G.E. Dieter: Mechanical metallurgy, McGraw Hill Book Company, New Delhi, 1986.
  2. J.N. Harris: Mechanical Working of Metals- Theory and Practice, Pergamon Press, Oxford, 1983.
  3. J. Lin, D. Balint, M. Pietrzyk: Microstructure evolution in metal-forming processes, Woodhead Publishing Limited, 2012.
  4. W. F. Hosford and R. M.Caddell: Metal Forming: Mechanics and Metallurgy, Prentice-Hall, 2011.
  5. A.S.M. Handbook Vol. 14, Forming and Forging, ASM International
  6. J. G. Lenard, Metal Forming Science and Practice, Elsevier Science Ltd., U.K, 2002