MS-Week-1a (1)

Course Information

• Course Title: ME 250 Materials Engineering

• Instructor: Zaara Ali

• Department: Mechanical Engineering, Wichita State University

• Location: Wichita, KS 67260

• Video Links:

  • Video 1

  • Video 2

Recommended Textbooks

• Materials Science and Engineering: An Introduction, 9th Edition

  • Authors: William D. Callister, Jr., David G. Rethwisch

  • Publisher: WILEY

• Foundations of Materials Science and Engineering, 5th Edition

  • Authors: William F. Smith, Javad Hashemi

Key Concepts in Materials Science

• Periodic Table of Elements: Essential for understanding material properties, grouped by characteristics (e.g., metals, nonmetals).

SI Base Units

• Meter (m): Length

• Kilogram (kg): Mass

• Second (s): Time

• Ampere (A): Electrical Current

• Kelvin (K): Thermodynamic Temperature

• Mole (mol): Amount of Substance

• Candela (cd): Luminous Intensity

SI Prefixes

• Extends from Yotta to Yocto, spanning 48 orders of magnitude.

• Important for representing and calculating measurements in science.

Physical Constants

• Avogadro's Number: 6.023 × 10²³ molecules/mole

• Boltzmann's Constant: 1.38 × 10⁻²³ J/atom·K

• Planck's Constant: 6.63 × 10⁻³⁴ J·s

• Speed of Light in Vacuum: 3 × 10⁸ m/s

• Constants are critical for calculations in material properties.

Introduction to Materials Science

• Investigates the relationship among processing, structure, properties, and performance of materials.

• Structures vary from subatomic to macroscopic levels, influencing material properties.

Historical Perspective

• Stone Age: Utilization of natural materials.

• Bronze Age: Use of alloys, improved material properties.

• Iron Age: Introduction of iron and steel, significantly impacting daily life.

• Advanced Materials Era: Development of ceramics, polymers, and nanomaterials.

Types of Materials

• Metals: Strong, ductile, good conductors; e.g., Iron, Steel.

• Semiconductors: Electrical properties influenced by contaminants; e.g., Silicon.

• Ceramics: Hard, brittle materials that may be insulators; e.g., Glass.

• Polymers: Lightweight, decomposable at moderate temperatures; e.g., Plastics.

• Composites: Engineered materials combining properties of different materials.

Material Properties

• Mechanical: Strength, ductility.

• Electrical: Conductivity, resistivity.

• Thermal: Heat conductivity.

• Optical: Light transmittance and scattering.

• Chemical Stability: Corrosion resistance.

Future of Materials Science

• Miniaturization: Development of nanostructured materials.

• Smart Materials: Adaptive materials for various applications (e.g., self-deicing airplane wings).

• Environment-friendly Materials: Biodegradable plastics, improved nuclear waste methods.

• Biomimicry: Learning from biological systems for advanced materials.

Materials Selection Process

1. Application: Define required properties.

2. Properties: Identify candidate materials based on their structure and composition.

3. Processing: Determine required processing methods to achieve desired structures.