Matse 2 - Study guides, Class notes & Summaries

Matse 259 Final Exam Review With 100% Correct Answers Coarse Pearlite high diffusion allows Carbon atoms to diffuse over long distances and form thick lamellae Fine Pearlite low diffusion allows Carbon atoms to diffuse over short distances and form thin lamellae Martensite NOT diffusion driven independent of time Process Annealing used to negate effects of coldwork and to soften and increase ductility recovery and recrystalization can occur Stress Relief component is ...

MATSE 259 Exam 1 PSU With Complete Solutions Elastic Modulus (e) measure of stiffness, or a material's resistance to elastic deformation ... slope of elastic portion of stress-strain curve Crystalline Materials small group of atoms that are repeated by translation to form 3-D arrangements Antisotropic properties that vary with direction. Ex: E(edge) isn't equal to E(diagonal) Polycrystal properties that may or may not vary with direction Isotropic the grains a...

MATSE 201 Exam 1 Theoretical Questions With 100% Correct Answers What is true regarding the crystal systems? there are 7 shapes that can completely fill 3D space through translational symmetry Which of the following is not one of the crystal systems? Face centered cubic examples of crystal systems: tetragonal, rhombohedral, trigonal Elemental metals do not commonly crystallize in which of the following lattices Simple cubic Which direction has the highest linear density in ...

MATSE 201 Final Exam Questions With Answers When a material acquires heat, it will gain kinetic energy in the form of quantized vibrations called _____________. A) thermal shock B) thermal conductivity C) phonons D) photons C) phonons The relationship between heat transferred to and absorbed by a substance is given by, Q=m•c•∆T. Which of the following is a major assumption for that relationship? A) No change in dimension over temperature range of ∆T B) No phase change ov...

Matse 201 Exam 1 With Complete Solutions Metals metallic bonding where electrons are delocalized - dense, stiff, strong, ductile - high thermal & electrical conductivity - opaque, reflective Polymers/plastics covalent bonding where electrons are shared - soft, ductile, low strength, low density - thermal & electrical insulatiors - optically translucent or transparent Ceramics ionic bonding where electrons are donated and received - oxides, nitrides, carbides - hard, brittle...

MATSE 259 Exam 1 With Complete Solutions Hooke's Law σ = Eε σ: engineering stress ε: engineering strain E: modulus of elasticity Elastic Elongation and Strain v = -εx/εz = -εy/εz applied tensile stress, elastic elongation and accompanying strain Tensile Strength (MPa or psi) -Stress at max of stress-strain curve -Max stress that can be sustained by a structure in tension Toughness -Ability of material to absorb energy up to a fracture -Area under stress-st...

Matse 201 Exam 3 Questions With Verified Answers 3R above the debye temp, the heat capacity levels off to this value higher the debye temp is higher/lower for ceramics than for metals phonon quantized mode of vibration in a crystal alpha coefficient of thermal expansion is denoted by decreases alpha increases/decreases with increasing bond strength stronger, closer stronger/weaker bonds and farther/closer atomic spacing facilitates heat transfer decrease def...

MATSE 259 Exam 1 With Complete Solutions Hooke's Law σ = Eε σ: engineering stress ε: engineering strain E: modulus of elasticity Elastic Elongation and Strain v = -εx/εz = -εy/εz applied tensile stress, elastic elongation and accompanying strain Tensile Strength (MPa or psi) -Stress at max of stress-strain curve -Max stress that can be sustained by a structure in tension Toughness -Ability of material to absorb energy up to a fracture -Area under stress-st...

metalsmost elements exist as metal alloysa homogenous mixture of two or more elements at least one of which is a metal, and where the resulting material has metallic properties intermetallic compoundsimilar to alloy but the mixture exists as a stoichiometric compound (distinct atomic ratios) ceramicsinorganic, non-metallic substances ceramicssolids formed between metallic and nonmetallic elements, most frequently oxides nitrides and carbons

Matse 259 Final Exam Review With 100% Correct Answers Coarse Pearlite high diffusion allows Carbon atoms to diffuse over long distances and form thick lamellae Fine Pearlite low diffusion allows Carbon atoms to diffuse over short distances and form thin lamellae Martensite NOT diffusion driven independent of time Process Annealing used to negate effects of coldwork and to soften and increase ductility recovery and recrystalization can occur Stress Relief component is ...