Manufacturing Part 2 © 2011 International Technology and Engineering Educators Association, STEMCenter for Teaching and Learning™ Foundations of Technology.

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Manufacturing Part 2 © 2011 International Technology and Engineering Educators Association, STEMCenter for Teaching and Learning™ Foundations of Technology

Properties of Materials Properties of Materials can be categorized: Mechanical Electrical Magnetic Optical Thermal © 2011 International Technology and Engineering Educators Association, STEMCenter for Teaching and Learning™ Foundations of Technology ©International Technology Education Association Center to Advance the Teaching of Technology & Science Engineering byDesign™

Mechanical Properties https://www.youtube.com/watch?v=5QaqwmZ7Sic https://www.youtube.com/watch?v=I28m4FZzqro https://www.youtube.com/watch?v=mTPYmrCuYnY Tensile strength: measuring of resistance to being pulled apart Fracture toughness: the ability of a material containing a crack to resist fracture Fatigue strength: ability of material to resist various kinds of rapidly changing stresses Creep strength: ability of a metal to withstand a constant weight or force at elevated temperatures Hardness: property of a material to resist permanent indentation Mechanical Properties https://www.youtube.com/watch?v=PhQLHfCg-Rs © 2011 International Technology and Engineering Educators Association, STEMCenter for Teaching and Learning™ Foundations of Technology ©International Technology Education Association Center to Advance the Teaching of Technology & Science Engineering byDesign™

Electrical Properties Conductivity: measure of how well a material accommodates the movement of an electric charge Resistivity: opposition of a material to the flow of electrical current https://www.youtube.com/watch?v=4WillWjxRWw https://www.youtube.com/watch?v=HBnICnUhTZI © 2011 International Technology and Engineering Educators Association, STEMCenter for Teaching and Learning™ Foundations of Technology ©International Technology Education Association Center to Advance the Teaching of Technology & Science Engineering byDesign™

Magnetic Properties Magnetic susceptibility : ratio of magnetization (M) to magnetic field (H) Curie temperature : temperature at which a material will lose magnetism Saturation magnetization: state reached when an increase in applied external magnetizing field H cannot increase the magnetization of the material further https://www.youtube.com/watch?v=haVX24hOwQI © 2011 International Technology and Engineering Educators Association, STEMCenter for Teaching and Learning™ Foundations of Technology ©International Technology Education Association Center to Advance the Teaching of Technology & Science Engineering byDesign™

Thermal Properties Coefficient of thermal expansion: how much a material will expand for each degree of temperature increase Heat capacity: amount of heat required to change a material’s temperature by a given amount Thermal conductivity: indicates a material’s ability to conduct heat © 2011 International Technology and Engineering Educators Association, STEMCenter for Teaching and Learning™ Foundations of Technology ©International Technology Education Association Center to Advance the Teaching of Technology & Science Engineering byDesign™