Chapter2ba - 2003 Bil Young 1 Materials &...

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Unformatted text preview: 2003 Bil Young 1 Materials & Processes in Manufacturing ME 151 Chapter 2 Properties of Materials ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ 2003 Bil Young 2 Introduction Material selection is one of the most important aspects of the design process Material selection directly affects product _______ and ___ Material selection criteria is based on meeting the following characteristics for each part or component _____________ Characteristics (strength, rigidity, resistance to fracture, withstand vibration & impact) ___________ Characteristics (weight, electrical properties, thermal properties, magnetic properties) ______________ Characteristics (ability to operate under temperature extremes, resist corrosion) ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ 2003 Bil Young 3 Various ways of classifying or distinguishing between engineering materials Metallic vs Nonmetallic Materials Physical vs Mechanical Properties Stress and Strain ________ Properties Dynamic Properties Temperature Effects on Materials ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ 2003 Bil Young 4 Metallic vs. Nonmetallic Materials Metallic Materials Luster High Thermal Conductivity High Electrical Conductivity Good Ductility Good Magnetic Properties Examples: iron, copper, aluminum, lead, etc.. Nonmetallic Materials Wide Range of Properties Poor Thermal Conductivity Poor Electrical Conductivity Less Ductile Weaker Examples: wood, brick, concrete, glass, rubber, plastics, etc.. ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ 2003 Bil Young 5 Physical vs. Mechanical Properties __________________ - Properties insensitive to structure which can be measured without applying force [Density, Melting Point, Thermal Conductivity, Magnetic Properties, Electrical Conductivity] ____________________ - Describe a material response to applied loads [Youngs Modulus, Resilience, Ductility, Toughness, Hardness, Brittleness, Strength, Etc] ___________________________________...
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Chapter2ba - 2003 Bil Young 1 Materials &...

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