501231, Materials Science
Elsadig
Mahdi
2014
QATAR UNIVERSITY
DEPARTMENT OF MECHANICAL & INDUSTRIAL ENGINEERING
501231
Materials Science
COURSE OUTLINE
February 14
By
Prof. Dr. Elsadig Mahdi
501231, Materials Science
Elsadig
Mahdi
2014
CATALOG DESCRIPTI

MechanicalProperties
METALS
ModulusofResilience
Resilience is the capacity of a material to absorb energy
whenitisdeformedelasticallyandthen,uponunloading,to
havethisenergyrecovered.
Theassociatedpropertyisthemodulusofresilience(Ur),
which is the strain

CHAPTER 5:
DIFFUSION IN SOLIDS
ISSUES TO ADDRESS.
What is diffusion?
How does diffusion occur?
How does diffusion depend on structure and
temperature?
How can the rate of diffusion be predicted for
some simple cases?
Why is it an important part of pr

MechanicalProperties
Highlights,Motivationand
CriticalConcepts
Almost all engineering materials are subjected to external
loads in service, and even during processing.
What mechanical engineers need to know before they deal
with a material is mechanical p

GENG 222:
Dynamics
Dr. W. Jong Yoon
Mechanical Engineering
Qatar University
Spring 2014
Week10-b
Dr. W. Jong Yoon, Qatar University, GENG 222
(Dynamics), Spring 2014
What did you learn?
Impact Example
Ch. 15 Kinematics of Rigid Bodies
Dr. W. Jong Yoon,

GENG 222:
Dynamics
Dr. W. Jong Yoon
Mechanical Engineering
Qatar University
Spring 2014
Week11-a
Dr. W. Jong Yoon, Qatar University, GENG 222
(Dynamics), Spring 2014
What did you learn?
Quiz 5
Rotation of
a Rigid Body About a Fixed Axis
Example
Dr. W.

GENG 222:
Dynamics
Dr. W. Jong Yoon
Mechanical Engineering
Qatar University
Spring 2014
Week10-c
Dr. W. Jong Yoon, Qatar University, GENG 222
(Dynamics), Spring 2014
What did you learn?
Ch. 15 Kinematics of Rigid Bodies
Translation
Rotation About a Fix

GENG 222:
Dynamics
Dr. W. Jong Yoon
Mechanical Engineering
Qatar University
Spring 2014
Week10-a
Dr. W. Jong Yoon, Qatar University, GENG 222
(Dynamics), Spring 2014
What did you learn?
Impact
Dr. W. Jong Yoon, Qatar University, GENG 222
(Dynamics), Spri

GENG 222:
Dynamics
Dr. W. Jong Yoon
Mechanical Engineering
Qatar University
Spring 2014
Week9-a
Dr. W. Jong Yoon, Qatar University, GENG 222
(Dynamics), Spring 2014
What did you learn?
Principle of Impulse and Momentum
Examples
Dr. W. Jong Yoon, Qatar U

CHAPTER 4:
IMPERFECTIONS IN SOLIDS
ISSUES TO ADDRESS.
What are the solidification mechanisms?
What types of defects arise in solids?
Can the number and type of defects be varied and controlled?
How do defects affect material properties?
Are defects unde

CHAPTER 3: CRYSTAL
STRUCTURES &
PROPERTIES
ISSUES TO ADDRESS
q
How do atoms assemble into solid structures? (for now, focus on metals)
q
How does the density of a material depend on its structure?
q
When do material properties vary with the sample (i.e.,

MATERIAL
S SCIENCE
INTRODUCTIO
N
Materials: Science; Engineering;
Structures science involves
Strictly
speaking,
materials
investigating the relationships that exist between the
structures and properties of materials.
In contrast, materials engineering is

CHAPTER 9: PHASE DIAGRAMS
ISSUES TO ADDRESS.
When we combine two elements.
what equilibrium state do we get?
In particular, if we specify.
-a composition (e.g., wt%Cu - wt%Ni), and
-a temperature (T)
then.
How many phases do we get?
What is the composit

Fatigue Failure
FATIGUE CONSIDERATION IN
DESIGN
In this section we will be discussing on
design aspects related to fatigue failure,
an important mode of failure in
engineering components.
Fatigue failure results mainly due to
variable loading or more prec

A screw dislocation has burger vector parallel
to the dislocation line.
An edge dislocation has burger vector
perpendicular to the dislocation line.
1
Chapter 4-
Mixed Dislocations
Many dislocations have both screw and edge components
called mixed disloca

Defects
The crystals are called perfect when all unit cells consist of
the ideal arrangement of atoms or molecules and all cells
line-up in a three dimensional space with no distortion.
In reality, some cells may have one or more atoms less
whereas others

Class activities
Crystal Structures
1a
The majority of common metals have either
a Face Center Cubic Structure, Fig la, a
Body Centered Cubic Structure, Fig.lb or
an Hexagonal Close Packed Structure
Fig.lc.
These are usually abbreviated to FCC, BCC
or HCP

GENG 222:
Dynamics
Dr. W. Jong Yoon
Mechanical Engineering
Qatar University
Spring 2014
Week9-c
Dr. W. Jong Yoon, Qatar University, GENG 222
(Dynamics), Spring 2014
What did you learn?
Midterm
Conservation of linear momentum
for a system of particles
I

GENG 222:
Dynamics
Dr. W. Jong Yoon
Mechanical Engineering
Qatar University
Spring 2014
Week8-b
Dr. W. Jong Yoon, Qatar University, GENG 222
(Dynamics), Spring 2014
What did you learn?
Conservation of Energy
Examples
Midterm Preview
Dr. W. Jong Yoon, Q

GENG 222:
Dynamics
Dr. W. Jong Yoon
Mechanical Engineering
Qatar University
Spring 2014
Week8-c
Dr. W. Jong Yoon, Qatar University, GENG 222
(Dynamics), Spring 2014
What did you learn?
Principle of Impulse and Momentum
concept
Dr. W. Jong Yoon, Qatar Un

GENG 222:
Dynamics
Dr. W. Jong Yoon
Mechanical Engineering
Qatar University
Spring 2014
Week4-a
Dr. W. Jong Yoon, Qatar University, GENG 222
(Dynamics), Spring 2014
What did you learn?
Quiz #1
Curvilinear Motion:
- Radial and Transverse Components
Dr. W

GENG 222:
Dynamics
Dr. W. Jong Yoon
Mechanical Engineering
Qatar University
Spring 2014
Week3-a
Dr. W. Jong Yoon, Qatar University, GENG 222
(Dynamics), Spring 2014
What did you learn?
Rectangular Components of
Velocity & Acceleration: Projectile
Dr. W.

GENG 210:
Dynamics
Dr. W. Jong Yoon
Mechanical Engineering
Qatar University
Spring 2014
Week4-c
Dr. W. Jong Yoon, Qatar University, GENG 222
(Dynamics), Spring 2014
What did you learn?
Newtons Second Law
Dr. W. Jong Yoon, Qatar University, GENG 222
(Dyna

GENG 222:
Dynamics
Dr. W. Jong Yoon
Mechanical Engineering
Qatar University
Spring 2014
Week2-a
Dr. W. Jong Yoon, Qatar University, GENG 222
(Dynamics), Spring 2014
What did you learn?
Determination of the Motion of a Particle
Examples
Derivatives
Dr.

GENG 222:
Dynamics
Dr. W. Jong Yoon
Mechanical Engineering
Qatar University
Spring 2014
Week1-b
Dr. W. Jong Yoon, Qatar University, GENG 222
(Dynamics), Spring 2014
What did you learn?
Introduction of the Course
Mechanics
Interesting Videos
Objectives

GENG 222:
Dynamics
Dr. W. Jong Yoon
Mechanical Engineering
Qatar University
Spring 2014
Week2-c
Dr. W. Jong Yoon, Qatar University, GENG 222
(Dynamics), Spring 2014
What did you learn?
Uniform Rectilinear Motion
Uniformly Accelerated Rectilinear
Motion

GENG 222:
Dynamics
Dr. W. Jong Yoon
Mechanical Engineering
Qatar University
Spring 2014
Week1-a
Dr. W. Jong Yoon, Qatar University, GENG 222
(Dynamics), Spring 2014
What is Mechanical Engineering? (1)
Discipline that was developed from the application
of

GENG 222:
Dynamics
Dr. W. Jong Yoon
Mechanical Engineering
Qatar University
Spring 2014
Week1-c
Dr. W. Jong Yoon, Qatar University, GENG 222
(Dynamics), Spring 2014
What did you learn?
Dynamics
Kinematics
Particles vs. Rigid body
Rectilinear Motion of Par

GENG 222:
Dynamics
Dr. W. Jong Yoon
Mechanical Engineering
Qatar University
Spring 2014
Week5-a
Dr. W. Jong Yoon, Qatar University, GENG 222
(Dynamics), Spring 2014
What did you learn?
Newtons Second Law
Dr. W. Jong Yoon, Qatar University, GENG 222
(Dyna

GENG 210:
Dynamics
Dr. W. Jong Yoon
Mechanical Engineering
Qatar University
Spring 2014
Week4-b
Dr. W. Jong Yoon, Qatar University, GENG 222
(Dynamics), Spring 2014
What did you learn?
Curvilinear Motion:
- Radial and Transverse Components
Example
Dr. W