Course Details
Subject {L-T-P / C} : MM3201 : Deformation Behavior of Materials { 3-0-0 / 3}
Subject Nature : Theory
Coordinator : Natraj Yedla
Syllabus
| Module 1 : |
Elastic behavior: concept of elasticity in three dimensions, generalized Hook’s law, plane stress and plane strain state, strain energy. (5 h) |
| Module 2 : |
Theory of plasticity: flow curve; yield criteria, plastic stress-strain relationship, dislocation theory: line defects, deformation by slip, theoretical shear strength, critical resolved shear stress, stress intensity factor. (10 h) |
| Module 3 : |
Burgers vector and dislocation loop, edge, screw, mixed and partial dislocations, dislocation reactions, dislocations in FCC and BCC crystals, cross slip and climb of dislocations (8 h) |
| Module 4 : |
Interaction of dislocations, energy of dislocations, forces on dislocations, dislocation sources and multiplication of dislocations, dislocation pile-ups (7 h) |
| Module 5 : |
Deformation twinning: classification, slip vs. twinning, stress for twinning. Strain hardening in single crystals and polycrystals (6 h) |
| Module 6 : |
Yield point phenomenon, strain aging, dynamic strain aging, Bauschinger’s effect, strengthening mechanisms. (6 h) |
Course Objective
| 1 . |
To develop an understanding on the stress and strain relationships for elastic behavior. |
| 2 . |
To provide insights into the yielding criterion, stress and strain relationships. |
| 3 . |
To make understand the deformation mechanisms in metals/alloys and correlation with the deformation behavior. |
| 4 . |
Identifying the role of defects and their interactions on the strength and fracture of metals. |
Course Outcome
| 1 . |
Knowledge on the elastic deformation, elastic constants and their relationships. |
| 2 . |
To solve problems related to elasticity. |
| 3 . |
An understanding on the plastic behavior and theories of yielding. |
| 4 . |
To solve problems related to plasticity. |
| 5 . |
To identify ductile/brittle metallic systems based on the knowledge of slip systems. |
| 6 . |
To improve the strength/ductility of the metals/alloys from the knowledge of deformation mechanisms and strengthening mechanisms. |
Essential Reading
| 1 . |
Dieter, Mechanical Metallurgy, USA. New York: McGraw-Hill: , ISBN-0-07-084187-X |
| 2 . |
D. Hull and DC Bacon, Introduction to dislocations, Elsevier Butterworth-Heinemann,2009 , ISBN: 978-81-312-2105-1 |
Supplementary Reading
| 1 . |
Hertzberg, R. W., & Saunders, H, Deformation and fracture mechanics of engineering materials, John Wiley & Sons, 2011 , ISBN-978-81-265-3042-7 |
| 2 . |
Shetty, M. N., Dislocations and mechanical behaviour of materials, PHI Learning, 2013 , ISBN-978-81-203-4638-3 |
Journal and Conferences
| 1 . |