Materials Crib Sheet 2 (Ch 6, 18, 19)-1

Materials Crib Sheet 2 (Ch 6, 18, 19)-1 - Constants &...

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Unformatted text preview: Constants & Conversions giga G 10 9 milli m 10-3 mega M 10 6 micro 10-6 kilo k 10 3 nano n 10-9 centi c 10-2 pico p 10-12 k = 1.3810-23 J/atom K = 8.6210-5 eV/atom K R = 8.314 J/mol K N A = 6.02310 23 atoms/mol-19-31 Spring 2010 Dont you wish your C03 TA was this fucking cool? Chapter 6 Mechanical Properties of Metals Types of stresses : Tensile, Compressive, Shear, Biaxial Tension Compression, Hydrostatic. Stress: F A = , Strain: l l = Shear stress: F A = , Shear strain: tan l l = = Stress and strain are proportional to each other using E = (E Youngs Modulus) or G = (G Shear Modulus). Physics of elasticity: 2 2 F U E r r = :: , Energy stored: 2 1 2 2 V W V E = = , Poissons ratio: x z = - (bottom of ratio strain in direction of applied force) ( 29 2 1 E G = + . Deformation: Metallic materials deform elastically (reversible) until strains of about .005. After that, plastic (irreversible) deformation occurs. *Note: Elastic doesnt conserve volume, plastic does.* Work hardening : After they yield, metals get harder to deform. Tensile Strength = F max / A Ductility: % elongation = ](l f l ) / l ] * 100, % area reduction = [(A A f ) / A ] * 100 Hardness tests : indent indent P H A : (pressure vs. area) Brinell : ( 29 2 2 2 P HB D D D d =-- (P-load, D-diameter of steel ball: 10 mm, d-indent diameter), Resilience : 2 2 y R U E = Chapter 18 Electrical Properties of Solids Ohms Law: V IR = or J = ( - electrical conductivity, 1 / = , - electric field intensity, / V l = ), Resistivity:...
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This note was uploaded on 04/05/2010 for the course ENGINEERIN MATLS taught by Professor Provotas during the Spring '10 term at McMaster University.

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Materials Crib Sheet 2 (Ch 6, 18, 19)-1 - Constants &...

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