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We look at "10 things" ranging from the materials available to engineers in their profession to the many mechanical and electrical properties of materials that are important to their use in various engineering fields. We also go over the principles that go into making those materials.
You will be able to do the following by the end of the course:
- Recognize the important characteristics of materials used in modern engineering applications;
- Explain the underlying principle of materials science: "structure leads to properties."
- As illustrated by the Arrhenius relationship, identify the role of thermally activated processes in many of these important "things."
- Connect each of these topics to issues that have arisen (or may arise) in your life and work.
Syllabus :
1. Course Overview / The Menu of Materials / Point Defects Explain Solid State Diffusion
- Six Categories of Engineering Materials
- Structure Leads to Properties
- Crystallography and the Electron Microscope
- Introduction to the Arrhenius Relationship
- The Arrhenius Relationship Applied to the Number of Vacancies in a Crystal
- Point Defects and Solid State Diffusion
- The Arrhenius Relationship Applied to Solid State Diffusion
2. Dislocations Explain Plastic Deformation / Stress vs. Strain -The “Big Four” Mechanical Properties
- Defining a Linear Defect - the Dislocation
- Plastic Deformation by Dislocation Motion
- The Stress versus Strain (Tensile) Test
- The “Big Four” Mechanical Properties
- Focusing on Strength and Stiffness
- Beyond the Tensile Strength
- Focusing on Ductility
- A Fifth Parameter – Toughness
3. Creep Deformation / The Ductile-to-Brittle Transition
- Definition of Creep Deformation
- The Creep Curve
- Creep Deformation and the Arrhenius Relationship
- Mechanisms for Creep Deformation
- The Ductile-to-Brittle Transition and Crystal Structure
- Plotting the Ductile-to-Brittle Transition
4. Fracture Toughness / Fatigue
- Introducing the Concept of Critical Flaws
- Fracture Toughness and the Design Plot
- Critical Flaw Size and the Design Plot
- A Play of Good versus Evil!
- Introduction to Fatigue
- Defining Fatigue
- The Fatigue Curve and Fatigue Strength
- Mechanism of Fatigue
5. Making Things Fast and Slow / A Brief History of Semiconductors
- Introduction to Phase Diagrams
- The Lead-Tin Phase Diagram
- The Competition Between Instability and Diffusion
- The TTT Diagram for Eutectoid Steel
- Diffusional Transformations
- Diffusionless Transformations
- A Brief History
- The Intrinsic Semiconductor
- The Extrinsic Semiconductor
- Combined Intrinsic and Extrinsic Behavior
