Eng Mat Chapter 1

8/2/2019 Eng Mat Chapter 1

1/30


2/30

19 March 2012 2

DISTRIBUTION (%) REMARKS

1) ASSIGNMENTS 20 %

+- 4 assignments

submit on MONDAY before 5PM. Late

submission not ALLOWED.

student to solve each assignment

indipendently. No point given if discoveredasignment exactly the same.

Discussion are allowed.

2) QUIZZES 10% basic question to be given without warning.

3) TEST 1 30 %

given during semester after a sizeable oflessons are learned.

2 hours with 4 problems to solve.4) TEST 2

5) FINAL EXAMINATION 40 % 3 hours examination with 4 problems to

solve.

contributes 40% of the final grade.


3/30

19 March 2012 3

Recommended reference books:

1. Serope Kalpakjian, Steven R. Schmid, 2010. ManufacturingEngineering and Technology, Sixth Edition, Pearson Prentice-Hall, Inc.

2. William D.Callister, Jr., 2007. Materials Science & Engineering:

An Introduction, Sixth Edition, John Wiley & Sons Inc.

3. William F. Smith and Javad Hashemi, 2006, Foundation of MaterialsScience and Engineering, Fourth edition, McGraw Hill Inc.


4/30

1. Introduction. 2. Materials Science and Engineering

3. Classification of Materials


5/30

Explain and discuss the materials science andmaterial engineering

Differentiates the types of engineeringmaterials and give examples on their currentand future applications.

Material selection and design for sustainability.


6/30

The relationship among structures,properties, processing, and

performance of materials

Better understanding ofstructure-composition-properties


7/30

Cost? Effective? Fabrication?

Safety?

Mechanical Engineer Civil & Structure Engineer Electrical Engineer Electronic Engineer Aerospace Engineer Chemical Engineer Etc


8/30


9/30


10/30

Materials Engineering..

Used of Materials Science knowledge (fundamental) to designand to produce materials with properties that will meet therequirements of societ


11/30

Basic knowledgeof materials

Resultant knowledge

of the structure,properties, processing,

and performance ofengineering materials

Applied knowledgeof materials

Materials science Materials engineering

Materials science& engineering


12/30

2003Brooks/ColePublishing/Thomson

Learning

Materials Science & Engineering


13/30

ENGINEERING

MATERIALS

Mechanicalproperties

&

Physicalproperties


14/30

Properties are the way material responds to environmental and external

forces;

Mechanical properties: Response to mechanical forces, strength and etc.

Electrical and magnetic properties: Response to electrical and magnetic

fields, conductivity and etc

Thermal properties are related to transmission of heat and heat capacityOptical properties include to absorption, transmission and scattering of

lights

Chemical stability in contact with environment corrosion resistance


15/30


16/30

Definition:

Inorganic substances which composed of one or two

metallic elements and may also contain nonmetallic elements.

Properties:Crystalline structure,

Good thermal and electrical conductors,Strong and ductile at room temperature,

Good strength at high temperature,Shiny when polished.

Metals and alloys classification:Ferrous metals and alloys (steels, cast irons)Nonferrous metals and alloys (aluminium, copper,zinc, titanium, nickel)

Examples:Metallic elements:

iron, copper, aluminium,nickel, titanium.

Nonmetallic elements:carbon, nitrogen, oxygen.


17/30

Application: Aircraft Turbine Engine


18/30

Definition:Consist of organic long molecular

Chains or networks.

Properties:Structure: most are crystalline, some are mix.

Vary strength, and ductility.Poor conductors of electricity

Good insulators

Low density, low softening temperature.

Application example:Manufacturing of digital video disks (DVDs)


19/30

Definition:

Inorganic substances consist of metallic elements andnonmetallic elements chemically bonded.

There are usually combination of metals or semiconductorwith oxygen, nitrogen or carbon (oxides, nitrides or

carbide).

Properties:

Structure: Crystalline, non-crystalline, mixtures of both.

High hardness, high temperature strength.Brittle, light weight, high strength.Good heat and wear resistance, reduced friction.

Insulative properties.


20/30

Domestic

Engineering Building

Industry


21/30

a) Advanced engine applications. b) Turbocharged diesel engine


22/30

Composite is a material which is made up of two or moredistinct materials (matrix and reinforcement).

Types of composite:PMC, MMC, CMC

The reinforcement is

usually stiffer than thematrix, thus stiffening the

composite material.

Example:

A familiar composite is concrete, which isbasically made up of sand and cement.


23/30


24/30


25/30

Unique properties :

Capable to alter electrical conductivities in their

surface chemistries in very localized areas (E.g.

Integrated Circuit). The conductivity is as good as metals because no

free electron and the electron valence is full.


26/30

26

1. Pick Application Determine required Properties

Processing: changes structureand overall shapeex: casting, sintering, vapor deposition, doping

forming, joining, annealing.

Properties: mechanical, electrical, thermal,magnetic, optical, deteriorative.

Material: structure, composition.2. Properties

Identify candidate Material(s)

3. Material Identify required Processing

Selecting the RIGHT material!


27/30

List the important properties of each of the

engineering materials you have learnt


28/30

1. What is engineering materials?2. What are the main classes of engineering materials?

3. Define a composite material. Give 3 examples of a

composite material and the applications.4. Define materials science and materials engineering.

5. List the important properties of each of the

engineering materials you have learnt.

6. List some materials usage that you have observed

over a period of time in some manufactured

products. What reasons can you give for the

changes that have occurred?


29/30

Use the right material for the job Understand the relation between properties,

structure, performance, and processing. Recognize new design opportunities offered

by materials selection.


30/30

Documents

Eng Mat Chapter 1