Emergency Exits

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Emergency Exits

• Please make yourself aware of the location of the
  emergency exits in this room.
• Food and Drink
• If you do bring food and drink into the room,
  please take empty cups, and paper etc. away with
  you.

Fall 08
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CHE 333

• Materials Engineering
• Richard Brown
• rbrown_at_egr.uri.edu

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Objectives

• Objective
• Introduce the area of materials science and
  engineering so that rational decisions involving
  materials in specific applications can be made.

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OUTCOMES

• Students of this class will achieve the following
  outcomes
• 1. An ability to design and conduct experiments
  as well as the analyze data.
• 2. Ability to communicate effectively.

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Outline

• Introduction, Types of Materials,
• Atomic Bonding, Crystal Structures.
• Solidification, Crystalline Defects.
• Phase Diagrams.
• Phase Transformations and Heat Treatments.
• Diffusion in the Solid State.
• Mechanical Properties of Metals.
• Strengthening Mechanisms and Failure.
• Mechanical Properties of Metals.
• Polymers
• Ceramic Materials
• Composite Materials
• Review Sessions.

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Exams, etc

• Exams
• One hour exams will be given during class on Oct
  3, Nov 2 and Nov 30with one take home at the end
  of the semester, distributed on Nov 30 and due
  Dec 7th. Please see Dr. Brown to accommodate
  requests regarding extra time and different
  locations. NO ELECTRONIC DEVICES DURING EXAMS,
  INCLUDING PHONES, IPODS, CALCULATORS.
• An example of the type of exam in this course
  will be shown in class.
• Grading Basis
• Each of the four exams will count 10 of the
  final grade. Homework will count for 20.
  Laboratory reports will count for 30 of the
  final grade. Presentations of the laboratory
  will count for 10. If a student cannot make an
  exam, make sure to call before with a legitimate
  reason for the absence. No attendance at an exam
  with no legitimate excuse will count for a ZERO
  If a student needs special provision please
  contact me.
• Office Hours
• Dr. Brown has office hours 1-2 p.m. on Wednesdays
  in Crawford rm 110. Teaching assistants will
  also be available.
• .

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EXAM

• 1. What is the hardenability of a steel and
  how is it different from hardness. What does
  tempering do to a quenched steel that is 100
  martensite.
• 2 What is an edge dislocation and what is a screw
  dislocation. Show how a Burgers circuit is
  constructed and compare vectors for an edge and
  screw dislocation.
• 3 How does carbon diffuse through iron? If a
  steel was decarburizing, how would you solve to
  find the time to reduce the carbon level to half
  the steel level and a depth of 0.5mm?
• 4 Draw an engineering stress strain curve, and
  compare it with a true stress strain for the same
  materials. Which curve would you use to explain
  work hardening and what is work hardening. Show
  how the 0.2 yield stress can be calculated.

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HOMEWORKS

• Homework assignments will be provided in class to
  be submitted on the following Monday class.
• E-Mail
• The e-mail address will be the URI address used
  by the registrars office on the official class
  roster.

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No Class days

• October 10, no classes BUT Monday classes on
  WEDNESDAY October 12, INCLUDING MONDAY LABS.
• November 24th, No classes.
• Dec 7th is last class in this course.

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Labs

• Laboratory Safety Class Wed Sept 14.
• Laboratories will start on Wednesday, September
  14, at 200 p.m. in room 121 Crawford Hall EXCEPT
  FOR THURSDAY LABS WHICH START ON SEPT 8,
  TOMORROW.
• Two powerpoint presentations and two laboratory
  reports are mandatory (40 of grade).
• All students must be registered in a lab section.

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Book

• There is no book required
• Notes will be on the web page, as will homeworks.
• http//www.egr.uri.edu/che/course/che333/index.htm
  
• Materials Science and Engineering An
  Introduction by William D. Callister
• William F. Smith, Materials Engineering
• Use the library.

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Illness Policy

• Illness Due to Flu  The H1N1 Flu Pandemic may
  impact classes this semester. If any of us
  develop flu-like symptoms, we are being advised
  to stay home until the fever has subsided for 24
  hours.  So, if you exhibit such symptoms, please
  do not come to class. Notify me at 874-2707 or
  rbrown_at_egr.uri.edu of your status, and we will
  communicate through the medium we have
  established for the class. We will work together
  to ensure that course instruction and work is
  completed for the semester. The Centers for
  Disease Control and Prevention have posted simple
  methods to avoid transmission of illness. These
  include  covering your mouth and nose with a
  tissue when coughing or sneezing frequently
  washing your hands to protect from germs
  avoiding touching your eyes, nose and mouth and
  staying home when you are sick. For more
  information, please view www.cdc.gov/flu/protect/h
  abits.htm lt http//www.cdc.gov/flu/protect/habits.
  htmgt .  URI information on the H1N1 will be
  posted on the URI website at www.uri.edu/news/H1N1
  lt http//www.uri.edu/news/H1N1gt , with links to
  the www.cdc.gov lthttp//www.cdc.govgt site.

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Materials Engineering

• How to employ natural and other materials for use
  by humans.
• Development of new materials.
• Understanding performance of materials.
• Improving performance of new and existing
  materials.

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Examples

• Ipods external case structural, color,
  electronic components mixtures of elements,
  polymers for line widths.
• Medical devices, replacement joints hips
  mixture of metals polymers and ceramics.
• Environmental processes, electroplating.
• Construction new steels, coatings, carbon fiber
  reinforcement.

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Examples

• Light weight cars aluminum, new alloys Audi,
  Chrysler.
• Fuel cells replacement for platinum catalyst,
  polymer membrane efficiency.
• Corrosion Alaska pipeline.
• Antifouling new coatings.

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Properties.

• Materials properties controlled by
• 1) composition the elements
• 2) thermo mechanical history heat and
  mechanical deformation processes
• 3) structure the phases present and their
  distribution.
• These are all related. The composition controls
  the structure somewhat as does the history.
• Optimize materials to obtain final properties. Eg
  strength, cost, appearance, conductivity,
  corrosion resistance, weight.

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Ferrari 2001
M. Schumacher 14 races won out of 16
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Materials Useage

• Carbon fiber used in most
• of the bodywork, even for
• suspension components.
• Titanium connecting rods
• are used with fractured
• surfaces for bearings onto
• crankshaft for better
• alignment. Strength to
• weight important along
• with stiffness.
• Bearings also important.
• Only three or four of these
• cars built. 10 BILLION
• bearings made per year.
• Cost/performance very
• different.

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Technology Development
Sword in Xian in China at the Terracota Army
Site. Today chrome plating and chromates are
environmental issues and their replacement is
sought.