Crystal structures, defects, mechanical properties, phase diagrams, corrosion, polymers, ceramics and composites.
39 cards · basic cards · AI-written, checked twice. Edit anything.
- What is the coordination number of atoms in a body-centered cubic (BCC) structure?
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8- What crystal structure has atoms at corners and face centers?
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Face-centered cubic (FCC)- What is the packing density of a simple cubic unit cell?
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52% or 0.52- Which crystal structure has the lowest packing efficiency?
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Simple cubic- Name the three primary crystal structures found in metals.
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Face-centered cubic (FCC), body-centered cubic (BCC), and hexagonal close-packed (HCP)- What type of point defect occurs when an atom is missing from its lattice position?
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Vacancy- Define an edge dislocation.
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A linear defect where an extra plane of atoms is inserted partway through the crystal- What is a Burgers vector?
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A vector describing the magnitude and direction of lattice distortion from a dislocation- What type of defect is a grain boundary?
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A planar defect where two crystal grains meet at different orientations- What is a stacking fault?
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A planar defect where the normal stacking sequence of atomic planes is disrupted- Define yield strength.
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The stress at which permanent plastic deformation begins- What is the difference between ultimate tensile strength and yield strength?
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UTS is maximum stress before fracture; yield strength is where permanent deformation starts- What does Young's modulus measure?
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The stiffness of a material or its resistance to elastic deformation- Define hardness in materials science.
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The resistance of a material to permanent deformation or scratching- What is ductility?
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The ability of a material to undergo significant plastic deformation without breaking
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