• Module I (10 hours)
• Concepts of crystals, Plastic deformation by slip
and twinning, Slip systems in FCC, BCC and
HCP lattices, Critical resolved shear stress for
slip, Theoretical shear strength of solids,
Stacking faults and deformation bands.
Observation of dislocations, Climb and cross
slip, Dislocations in FCC and HCP lattice, Partial
dislocations, Stress fields and energies of
dislocations, Forces between dislocations,
Interaction of dislocations, Dislocation sources
and their multiplications.
• Module II (10 hours)
• Strengthening from grain boundaries, Grain size
measurements, Yield point phenomenon, Strain
aging, Solid solution strengthening,
Strengthening from fine particles, Fiber
strengthening, Cold working and strain
hardening, Annealing of cold worked metal.
Fracture in metals, Griffith theory of brittle
fracture, Metallographic aspects of fracture,
Fractography, Dislocation theories of brittle
fracture, Ductile fracture, Notch effects, Strain
energy release rate in fracture, Fracture
toughness and design.
• Module III (10 hours)
• Fatigue of metals, The S-N curve, Low cycle
fatigue, Fatigue crack propagation, Effect of
stress concentration on fatigue, Size effect,
Surface effects and fatigue, Fatigue under
combined stresses, Effects of metallurgical
variables and fatigue, Corrosion fatigue, Design
for fatigue, Effect of temperature on fatigue.
Creep and stress rupture, Creep curve, Stress
rupture test, Mechanism of creep deformation,
Activation energy for steady state creep,
Superplasticity, Fracture at elevated
temperature, Creep resistant alloys, Creep
under combined stresses.
• Module IV (10 hours)
• Tension test, Stress-strain curves, Instability in
tension, Ductility measurement, Effect of strain
rate, temperature and testing machine on flow
properties, Stress relaxation testing, Notch
tensile test, Anisotropy of tensile properties.
Hardness test, Brinnel, Rockwell and Vickers
hardness, flow of metal under the indenter,
relationship between hardness and flow curve,
micro hardness testing, Hardness at elevated
• Text Book: Dieter M. George, Mechanical
Metallurgy, McGraw- Hill Inc., 2001.
• References:
• 1. Deformation and fracture mechanics, Richard
W Hertzberg John Wiley & Sons
• 2. Mechanical behaviour of Materials, Frank A
• 3. Physical Metallurgy Principles, Reed Hill and
Robert E, East West Press
• 4. Structure and properties of Materials, Hyden
W. M. Vol. 3, McGraw Hill
• 5. Plastic deformation of Metals , Honeycombe,
Arnold Press.
• An understanding of mechanical behavior is
important to both the development of new materials
and the selection of appropriate materials for many
• This is best investigated and understood by
integrating solid mechanics with the
microstructural basis of deformation and fracture.
• The course is intended as a formal basis for
students to pursue an integrated approach to the
mechanical behavior of material.
Mechanical Behaviour of materials- Thomas Courtney
(2nd Ed.McGraw Hill)
1. Mechanical Behaviour of Materials- Mark Andrew Meyers &
K.K. Chawla (Prentice Hall)
2. Mechanical Metallurgy- George Dieter (McGraw Hill)
3. Materials Science and Engineering-William Callister,Jr. (Wiley)
4. Engineering Materials,1, Michael Ashby and David Jones
5. Deformation and Fracture Mechanics of Engineering Materials,
Richard W. Hertzberg, (Wiley &Sons, NY)
Key Phrases - Statistically Improbable
Phrases (SIPs):
transient creep model, maximum shear criterion,
shear stress yield criterion,
engineering fracture strength,
making life estimates, nominal stress amplitude,
multistage spring, nonzero mean stress,
environmental crack growth, notched member,
creep elements, standard compact specimen,
maximum normal stress criterion,
short fatigue lives, principal normal stresses,
frictional sliders, uniaxial curve,
deformation plasticity theory, current crack length,
true fracture strength, plasticity limitations,
elastic stress concentration factor,
shear stress criterion, elliptical hysteresis,
principal normal strains
Inside This Book:
First Sentence
Designers of machines, vehicles, and structures must achieve acceptable levels of
performance and economy, while at the same time striving to guarantee that the
item is both safe and durable
Provides comprehensive treatment of
the mechanical behavior of materials
within a balanced mechanics-materials
Covering a range of materials, including
metals, polymers, ceramics, and
composites, this book presents the
properties of materials while addressing
the principal ideas behind theories of
mechanical behavior.
It includes broad treatment of flow and
fracture criteria. It presents various
mechanisms for tailoring the strength
and toughness of materials.
It also provides references and a list of
suggested readings in each chapter.
A valuable reference book on the mechanical behavior of
materials for all practicing Mechanical and Materials Engineers.
This text differs from others because the
treatment of plasticity has greater
emphasis on the interrelationship of the
flow, effective strain and effective stress
and their use in conjunction with yield
criteria to solve problems.
• The treatment of defects is new. Schmid’s
law is generalized for complex stress
states. Its use with strains allows for
prediction of R-values for textures.
• Another feature is the treatment of lattice
rotations and how they lead to deformation
• The chapter on fracture mechanics
includes coverage of Gurney's approach.
Much of the analysis of particulate
composites is new. Few texts include
anything on metal forming.
Includes numerous examples and end-ofchapter problems
Emphasizes quantitative problem solving
Briefer, less expensive, and more modern
than competition
This textbook is for courses on Mechanical Behavior of Materials taught in
departments of Mechanical Engineering and Materials Science.
The text includes numerous examples and problems for student practice. The
book emphasizes quantitative problem solving. End of the chapter notes are
included to increase students' interest.
• Introduces the field of materials science in a format
suitable for non-engineering students. Materials and their
properties are examined in the context of their use in
everyday objects including sports equipment,
automobiles, aircraft, display screens, compact disc
players, hip-replacements, etc. The role materials have
played and will continue to play in shaping society will be
discussed. Examples and demonstrations will be the
major component in this course. Course is intended as
an elective for non-engineering students. Course may
not be taken as a technical elective by students in the
College of Engineering. 3 hours.
How to study?
Eg: Human Behaviourthe potential and expressed capacity for physical, mental, and social
activity during the phases of human life.
Human beings, like other animal species, have a typical life course
that consists of successive phases of growth, each of which is
characterized by a distinct set of physical, physiological, and
behavioral features.