ChE 361

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ChE 361
reals

• Engineering Materials

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Syllabus and Course Schedule

• Complete version posted on Canvas

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Instructor Dr. M. Ginger Scarbrough Office JH
158 Phone [phone] Office Hours MWF
900-1015 AM Or via Canvas Or by
appointment Email gscarbro_at_nmsu.edu Use
Canvas for fastest response
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I check Canvas several times per day.
I check my NMSU email a few times per week.
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Required Textbook

• Materials Science
• and Engineering
• An Introduction, 8th Ed.
• by Callister and Rethwisch

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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

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Required Textbook

• Use other editions at your own risk.
• You are responsible for making adjustments for
  changes in section numbering and pages.

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Required igtclicker2
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Required igtclicker2or igtclicker
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Required igtclicker2or igtclickeror igtclicker
GO app
Use igtclicker GO at your own risk! Slow internet
connections may cause you to lose points during
clicker quizzes.
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igtclicker2

• Rent used26.00
• Rent new33.80
• Buy used39.00
• Buy new52.00
• igtclicker GO10/180 days use at your own
  risk
• I cannot solve igtclicker GO login/connection
  problems

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One Blue Scantron from ASNMSU (options A-J)
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What else do you need?
X
Rarely
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Why Not?
Calculations dont Always understanding
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What else do you need?
Curiosity
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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

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Clicker Questions

• Beginning of class
• 2-3 questions based on reading assignment
• During Class
• 3-7 questions based on lecture
• or on Materials Moments

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Extra Credit Opportunity

• The Materials Moment
• More information coming soon

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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

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Important dates

• Last Day to withdraw with a W
• Tuesday, 11 March
• Final Exam
• Monday, 5 May
• 1030-1230
• JH 283

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Borderline grades

• Extra credit and class participation
• move you up to the next letter grade.

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Attendance

• Attendance is encouraged
• Make-up exams
• Written justification required
• Must be taken in advance of assignment

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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.)

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Honesty

• Honesty is the only policy.

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Classroom Courtesy

• Please be courteous w/ electronics
• Participate in class discussions
• Ask Questions

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PowerPoint Slides

• Posted on Canvas the morning before class

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Keys to SuccessHow many hours should you
spendoutside of classto earn an A or B?
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Keys to SuccessBased on research on learning

1. Take notes on reading assignment before coming to
   class (about 1 hour)
2. Take notes in class on anything you dont
   remember from textbook notes
3. Spend 20 minutes MWF afternoon combining your two
   sets of notes (1 2)
4. Over weekend, spend one hour reviewing your notes.

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Keys to Success, contd

• 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.

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The Course Scheduleexplained
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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.

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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.
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Reading Assignment for TodayCallister and
Rethwisch

• Chapter 1Motivation
• Basics of Materials

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Definitions

• Materials Science

• Materials Scientist
• Materials Engineering
• Materials Engineer

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Interrelationships
Processing
Composition
Structure
Properties
Performance
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Primary Classes of MaterialsComposition

• Metals
• Ceramics
• Polymers
• Composites

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Metals High-carbon Steel

• High-Carbon Steel Jigsaw Blade

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Metals Titanium

• Obtanium bicycle shocks vs. steel
• Weight reduction
• Longer life
• Closer true-spring rate

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Ceramics Tempered glass

• Tempered glass sink

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Ceramics Borosilicates

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Ceramics Refractories

• Silica refractory bricks
• Industrial furnace

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Polymers Vulcanized Rubber

• Ice hockey requires a hard disk of vulcanized
  rubber.

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Polymers Thermoset Plastics

• Chemiplastica melamine thermoset plastics
  resistant to heat, chemicals, moisture,
  electricity and scratching.

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Polymers Plasticizers

• Our plasticizers impart impact resistance,
  improve low-temperature flexibility of fused
  films and provide thermal and light stability.

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Composites

• Concrete
• reinforced with rebar

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Composites

• Fiberglass kayak

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Composites Ceramic matrix

• Ceramic disc brakes
• Ceramic rods in a ceramic matrix

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Interrelationships
Processing
Composition
Structure
Properties
Performance
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Processing

• Processing determines
• properties

Example Raw timber vs. Paper
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Processing Clay becomes Fired clay pottery
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Interrelationships
Processing
Composition
Structure
Properties
Performance
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SEM Clay vs. Fired Clay
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Discrete clay quartz particles melt fuse into
vitreous material.
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StructuresExample BCC crystal Molybdenum
Atomic
Subatomic
Microscopic
Macroscopic
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Interrelationships
Processing
Composition
Structure
Properties
Performance
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Material Properties
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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 PropertyElasticityrecoverable
deformation

• Paper clip
• under normal use

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Mechanical PropertyPlasticitypermanent
deformation

• Paper clip
• under abuse

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Plasticity by design

• Radial profile
• segments

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Plasticity by accident

• Street lamp
• damaged during
• storm
• (Bridgeport, CN)

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Brittleness

• Pressure vessel fails during hydraulic test

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Corrosiveness

• Corroded ship at Guantanamo

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Interrelationships
Processing
Composition
Structure
Properties
Performance
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The Humble Hanger
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Humble Hanger What determines performance?
Processing
Composition
Structure
Properties
Performance
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The Humble Hanger
Coat hanger in 1880s schoolhouse
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The Humble Hanger
Hanger Patents
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The Humble Hanger
Hanger Patents
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Reading AssignmentCallister and Rethwisch

• Chapter 2
• Atomic Structure and Bonding
• 2.1, 2.2, 2.4, 2.62.8

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(No Transcript)
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Definitions

• Materials Science
• Study of relationships between structures and
  properties of materials.
• Defined on next slides

• Materials Scientists
• Develop new materials, perfect existing ones.

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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

• MetalsAl, Fe, Ni, Cr, Ti, etc.
• CeramicsMetallic-nonmetallic compounds (Glass,
  Concrete, porcelain, etc.)
• PolymersPlastic, rubber, nylon, etc.