Exam review
al_awa
361_01_intro_c.pptChE 361
Engineering Materials
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This course is the REAL thing!
Syllabus and Course Schedule
Complete version posted on Canvas
Instructor: Dr. M. Ginger Scarbrough
Office: JH 158
Phone: 646-5579
Office Hours: MWF 9:00-10:15 AM
Or via Canvas
Or by appointment
Email: [email protected]
Use Canvas for fastest response
I check Canvas several times per day.
I check my NMSU email a few times
per week.
Required Textbook
Materials Science
and Engineering:
An Introduction, 8th Ed.
by Callister and Rethwisch
Required Textbook
BN Bookstore:
$99 Rent used
$148 Rent new
$185 Buy used
$246 Buy new
$60 Buy eText
Wiley.com (see Canvas link):
$151 New Binder-ready
$60 eBook
$232 Buy new
Required Textbook
Use other editions at your own risk.
You are responsible for making adjustments for changes in section numbering and pages.
Required: i>clicker2
Required: i>clicker2
or i>clicker
Required: i>clicker2
or i>clicker
or i>clicker GO app
Use i>clicker GO at your own risk!
Slow internet connections may cause you to lose points during clicker quizzes.
i>clicker2
- Rent used—$26.00
- Rent new—$33.80
- Buy used—$39.00
- Buy new—$52.00
- i>clicker GO—$10/180 days
use at your own risk*
*I cannot solve i>clicker GO login/connection problems
One Blue Scantron from ASNMSU (options A-J)
What else do you need?
Rarely
X
Why Not?
Calculations don’t
Always = understanding
What else do you need?
Curiosity
Course Policies
- Grading
- 5-10 Clicker questions/day (scaled) = 25%
- 2 Exams (100 points each) = 40%
- 1 Comprehensive Final = 35%
Above point system subject to minor changes
Clicker Questions
Beginning of class:
2-3 questions based on reading assignment
During Class
3-7 questions based on lecture
or on “Materials Moments”
Extra Credit Opportunity
The Materials Moment
More information coming soon
Grading Scale
90-100% = A
80-90% = B
70-80% = C
60-70% = D
Below 60% = F
Final Score = the higher of:
• Average of all scores
• Final Exam Score
Important dates
- Last Day to withdraw with a “W”:
Tuesday, 11 March
- Final Exam:
Monday, 5 May
10:30-12:30
JH 283
Borderline grades
Extra credit and class participation
move you up to the next letter grade.
Attendance
- Attendance is encouraged
- Make-up exams
Written justification required
Must be taken in advance of assignment
Clicker Policies
- You may consult text or neighbors (unless instructed otherwise)
- You must be present in class to vote
- Lowest two clicker scores will be dropped to allow for forgotten/malfunctioning clickers.
- No make-ups for clickers except for excused absences. (See syllabus.)
Honesty
Honesty is the only policy.
Classroom Courtesy
- Please be courteous w/ electronics
- Participate in class discussions
- Ask Questions
PowerPoint Slides
Posted on Canvas the morning before class
Keys to Success
How many hours should you spend
outside of class
to earn an
A or B?
Keys to Success
Based on research on learning
Take notes on reading assignment before coming to class (about 1 hour)
Take notes in class on anything you don’t remember from textbook notes
Spend 20 minutes MWF afternoon combining your two sets of notes (1 & 2)
Over weekend, spend one hour reviewing your notes.
Keys to Success, cont’d
If you follow my advice,
You spend 2 hrs 20 minutes per week.
No need to cram for exams.
The day before an exam, spend about 2 hours studying.
The Course Schedule
explained
Why am I here?
- Because my major requires it.
- Because I live in a Material world.
- Because it is the most important course I will ever take.
Why am I here?
A. Because my major requires it.
B. Because I live in a Material world.
C. Because it is the most important course I will ever take.
Reading Assignment for Today
Callister and Rethwisch
Chapter 1–Motivation
–Basics of Materials
Definitions
- Materials Science
- Materials Scientist
- Materials Engineering
- Materials Engineer
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Interrelationships
Performance
Processing
Structure
Composition
Properties
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Primary Classes of Materials
Composition
- Metals
- Ceramics
- Polymers
- Composites
Metals: High-carbon Steel
High-Carbon Steel Jigsaw Blade
Metals: Titanium
“Obtanium” bicycle shocks vs. steel
• Weight reduction
• Longer life
• Closer true-spring rate
Ceramics: Tempered glass
Tempered glass sink
Ceramics: Borosilicates
Ceramics: Refractories
Silica refractory bricks:
Industrial furnace
Polymers: Vulcanized Rubber
Ice hockey requires a hard disk of vulcanized rubber.
Polymers: Thermoset Plastics
Chemiplastica melamine thermoset plastics resistant to heat, chemicals, moisture, electricity and scratching.
Polymers: Plasticizers
Our plasticizers impart impact resistance, improve low-temperature flexibility of fused films and provide thermal and light stability.
Composites
Concrete
reinforced with rebar
Composites
Fiberglass kayak
Composites: Ceramic matrix
Ceramic disc brakes:
Ceramic rods in a ceramic matrix
Interrelationships
Performance
Processing
Structure
Composition
Properties
*
*
Processing
Processing determines
properties
Example:
Raw timber
vs.
Paper
*
Processing
Clay becomes Fired clay pottery
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Interrelationships
Performance
Processing
Structure
Composition
Properties
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SEM: Clay vs. Fired Clay
1
2
3
Discrete clay & quartz particles melt & fuse into vitreous material.
Structures
Example: BCC crystal: Molybdenum
Subatomic
Atomic
Microscopic
Macroscopic
Interrelationships
Performance
Processing
Structure
Composition
Properties
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Material Properties
Properties
Brittleness
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Properties
Response to imposed stimulus.
[If I drop it (stimulus), will it break (response)?]
- mechanical
- electrical
- thermal
- deteriorative
- magnetic
- optical
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Mechanical Property:
Elasticity–recoverable deformation
Paper clip
under normal use
Mechanical Property:
Plasticity—permanent deformation
Paper clip
under abuse
Plasticity by design
Radial profile
segments
Plasticity by accident
Street lamp
damaged during
storm
(Bridgeport, CN)
Brittleness
Pressure vessel fails during hydraulic test
Corrosiveness
Corroded ship at Guantanamo
Interrelationships
Performance
Processing
Structure
Composition
Properties
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The Humble Hanger
Humble Hanger:
What determines performance?
Performance
Processing
Structure
Composition
Properties
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The Humble Hanger
Coat hanger in 1880s schoolhouse
The Humble Hanger
The Humble Hanger
Reading Assignment:
Callister and Rethwisch
Chapter 2
Atomic Structure and Bonding:
2.1, 2.2, 2.4, 2.6–2.8
Definitions
- Materials Science:
Study of relationships between structures* and properties* of materials.
*Defined on next slides
- Materials Scientists:
Develop new materials, perfect existing ones.
*
Definitions
- Materials Engineering:
Use knowledge of Materials Science to design:
- products that perform without failure.
- processing techniques for materials.
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Primary Classes of Materials
- Metals—Al, Fe, Ni, Cr, Ti, etc.
- Ceramics—Metallic-nonmetallic compounds (Glass, Concrete, porcelain, etc.)
- Polymers—Plastic, rubber, nylon, etc.
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