MY2100 Introduction to Materials Engineering Lecture Section E, MWF 2 pm, M

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MY2100 Introduction to Materials
EngineeringLecture Section E, MWF 2 pm, MME-U115

• Instructor Dr. Marv McKimpson
• Room .... 207 MME
• Phone ... [phone]
• Office Hours TR 9-1030 am
• Grading
• Midterm 1 . Friday, 9-22-00 ..... 20
• Midterm 2 . Wednesday, 10-18-00.. 20
• Midterm 3 . Friday, 11-1 7-00.... 20
• Final Exam . (TBA) ... 40

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Visual Materials...
Texts

• Engineering Materials 1 An introduction to their
  properties and applications - M. Ashby D.Jones
• Engineering Materials 2 An introduction to
  microstructures, processing design - M. R.
  Ashby D. R. H. Jones

• On the web at http//www.mse.mtu.edu/
• Class web site, MY2100, section E
• To illustrate and highlight concepts in the text
• May not duplicate text figures in every detail!
• Not a substitute for reading the text or coming
  to class!

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MY2100 Introduction to Materials Engineering

• Introduction to the structure, processing,
  properties and performance of engineering
  materials
• metals, polymers, glasses, ceramics and
  composites
• Case studies covering...
• selection of materials
• component design
• analysis of component failures

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1. Engineering materials and their propertiesKey
points

• Enormous range of engineering materials
• Types of material properties
• Range of properties within and among materials
  classes
• Development of new materials and their impact on
  design
• Failure to select suitable materials can lead to
  failure of engineering structures and systems
• Some failures can be quite spectacular
• Liberty ships
• Comet (1st commercial jetliner)
• Space Shuttle Challenger

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There are more than 50,000 commercially available
materials with which an engineer may choose to
design

• Table 1.2
• Metals and alloys
• Steel, aluminum, etc.
• Polymers
• Polyethylene, polystyrene, nylon, epoxies, etc.
• Ceramics and glasses
• Alumina, silica, silicon carbide, etc.
• Composite materials
• Fiberglass, carbon fiber reinforced polymers,
  etc.
• Natural materials
• Wood, leather, silk, bone

How to Choose?
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The Possible Combinations of Composite Materials
are Virtually Unlimited(Fig. 1.1)
Metals, Alloys
cermets
Steel cord tires
Composites
Ceramics, Glasses
Polymers
Filled polymers
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The Three Ps
Price
Successful Commercial Products
Performance
Producibility
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We Make Decisions Regarding Material Selection
Based on Material Properties

• Economic
• Mechanical
• Physical and Chemical
• Electrical, magnetic, optical
• Manufacturing
• Aesthetics

• Price, availablity, recyclability, etc.
• Modulus, yield strength, tensile strength, etc.
• Density, reactivity (oxidation corrosion),
  thermal expansion, melting temp., etc.
• Resistivity, dielectric constant, optical
  absorption, etc.
• Forming, joining, finishing, etc.
• Color, touch, texture, etc.

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Screwdriver
Mechanical
Economic
Physical and Chemical
Electrical Magnetic optical
Manufacturing
Aesthetics
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Jet Engine Fan Blades(complex Ni base alloys)
Directionally Cast
Single Crystal
Conventional
High Temperature Strength (creep)
Oxidation Resistance
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Microelectronic Devices are Complex Composite
Structures
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In Considering Materials for a Given Application,
The Desired Attributes of the Entire Engineering
System Must Be Considered
System Design