PHYSICAL PROPERTIES OF MATERIALS

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Importance of Melting in Manufacturing •Metal casting - the metal is melted and then poured into a mold cavity Metals with lower melting points are generally easier to cast •Plastic molding - melting characteristics of polymers are important in nearly all polymer shaping processes •Sintering of powdered metals - sintering does not melt the material, but temperatures must approach the melting point in order to achieve the required bonding of powders ©2002 John Wiley & Sons, Inc. M. P. Groover, “Fundamentals of Modern Manufacturing 2/e”
Thermal Properties •Thermal expansion, melting, and heat of fusion are thermal properties because temperature determines the thermal energy level of the atoms, leading to the changes in materials •Additional thermal properties: Specific heat Thermal conductivity These properties relate to the storage and flow of heat within a substance ©2002 John Wiley & Sons, Inc. M. P. Groover, “Fundamentals of Modern Manufacturing 2/e”
Page 1 and 2: PHYSICAL PROPERTIES OF MATERIALS
Page 3 and 4: Physical Properties in Manufacturin
Page 5 and 6: Density Defined Weight per unit vol
Page 7 and 8: Thermal Expansion •Density of a m
Page 9 and 10: Thermal Expansion in Manufacturing
Page 11 and 12: Melting of Metal Alloys •Unlike p
Page 13: Figure 4.1 - Changes in volume per
Page 17 and 18: Volumetric Specific Heat The quanti
Page 19 and 20: Thermal Diffusivity The ratio of th
Page 21 and 22: Mass Diffusion Movement of atoms or
Page 23 and 24: Mass Diffusion in Manufacturing •
Page 25 and 26: Electrical Properties •Movement o
Page 27 and 28: Resistivity Property that defines a
Page 29 and 30: Engineering Materials and Electrica
Page 31 and 32: Electrical Properties in Manufactur
Page 33 and 34: Terms in Electrochemical Processes
Page 35 and 36: Figure 4.3 -Example of electrolysis
Page 37 and 38: Chemical Reactions in Decomposition

PHYSICAL PROPERTIES OF MATERIALS

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