Date post: | 01-Jan-2016 |
Category: |
Documents |
Upload: | callum-mcknight |
View: | 39 times |
Download: | 0 times |
MAT 033: Engineering Materials and Processes
Course Objective...Introduce fundamental concepts in Materials Science
You will learn about:• material structure• how structure dictates properties• how processing can change structure
This course will help you to:• use materials properly• realize new design opportunities with materials
Lecturer: Chris Kiely
Time: Mon 11.10 – 12.00 ; Weds 11.10-12.00
Location: 101 Packard Laboratory
Activities:• Present new material• Announce reading and homework
• 2 Quizzes
Lectures
Purpose:• Discuss homework, quizzes and exams• Hand back graded quizzes, exams• Discuss concepts from lecture
Times and Places:
J.M. Rickman M. WatanabeR.P. VinciJ.M. RickmanA. Kovalskyy
Th 12.10 pm Th 1.10 pmFr 9.10 amFr 10.10 amFr 11.10 am
203 Whitaker 203 Whitaker 203 Whitaker203 Whitaker203 Whitaker
Recitations start this week.
Recitations
Required text:• Fundamentals of Materials Science and Engineering: An Integrated Approach
W.D. Callister, Jr. and D.G. Rethwisch, 3nd edition, John Wiley and Sons, Inc. (2008).
Course Material
Option 1: Hardbound version: $200 (new) - $144 (used)
Option 2: Simple ring binder version: $94
Option 3: On-line version $50
Option 4: Amazon Kindle version $97
Reading Schedule
See the detailed course syllabus which is posted on:-
coursesite
Go to http://coursesite.lehigh.edu/ and login using your Lehigh username and password
Course materials will be posted under:-
MAT-033-00-FL10-ENGR MATLS & PROCESSES
Weekly homework problems – 20%
Quiz #1 20%Scheduled for: 10/04Material covered ; Lectures 1-8
Quiz #2 25%Scheduled for: 11/08Material covered; Lectures 9-16
Final Exam 25%To be scheduled
Material covered: everything w/extra emphasis on last 10 lectures
Grading
Recitation sessions/pop quizzes – 10%
The Weekly Homework “Cycle”
Lectures are on Mondays and Wednesdays.
Recitations are on Thursdays/Fridays.
• Homework assigned weekly and will be posted on the coursesite every Tuesday.
• Homework must be handed in at the beginning of the lecture on the following Monday.
• Homework will returned during the Thur/Fri recitation session.
The Periodic Table
Structural feature Dimension (m)
atomic bonding
crystals (ordered atoms)
second phase particles
crystal texturing
< 10-10
10-10
10-8-10-1
10-8-10-4
> 10-6
Materials Classification – Metals
• Dense
• Good electrical conductors
• Good heat conductors
• Shiny appearance – lustrous
• Strong
• Deformable- malleable
• Sometimes magnetic
Pure metals or combinations of metallic elements (alloys) – metallic bonding
Materials Classification – Ceramics
• Hard
• Brittle
• Electrical insulators
• Poor thermal conduction
• Heat and corrosion resistant
• Can be transparent or opaque
Compounds between metallic and non-metallic elements - Ionic or covalently bonded
Materials Classification – Polymers
• Huge variety of properties
• Low densities
• Non-conductors
• Low melting points
• Can be very flexible
Organic compounds based on C, H and other non-metallic elements – covalent and secondary bonding
Composites-which consist of more than one material type
SemiconductorsCeramic materials that have electrical properties that are intermediate between that of conductors and insulators
Micromechanical machines made from silicon
Transistor Technology
Biomaterials- metal, ceramic or polymer materials designed for implanting in the human body
ex: hardness vs structure of steel • Properties depend on structure
ex: structure vs cooling rate of steel • Processing can change structure
Effect of Processing e.g. Mechanical Properties
Cooling Rate (C/s)
100
200
300
400
500
600
0.01 0.1 1 10 100 1000
(a)
30m
(b)
30m
(d)
30m(c)
4m
Hard
ness
(B
HN
)
T (°C)-200 -100 0
Cu + 3.32 at%Ni
Cu + 2.16 at%Ni
deformed Cu + 1.12 at%Ni
1
2
3
4
5
6R
esi
stiv
ity,
(1
0-8 O
hm
-m)
0
Cu + 1.12 at%Ni
“Pure” Cu
• Electrical Resistivity of Copper:
• Adding “impurity” atoms to Cu increases resistivity.• Deforming Cu increases resistivity.
Effect of Composition & Processing
e.g. Electrical Properties
• Transmittance: - Aluminum oxide may be transparent, translucent, or opaque depending on the material structure.
single crystalpolycrystal:low porosity
polycrystal:high porosity
Effect of Structuree.g. Optical Properties
1. Pick Application Determine required Properties
2. Properties Identify candidate Material(s)
3. Material Identify required Processing
Processing: changes structure and overall shapeex: casting, sintering, vapor deposition, doping, forming, joining, annealing.
mechanical, electrical, thermal, magnetic, optical, corrosion resistance.
Material: structure, composition.
Materials Selection