3.2. Dislocations—Linear Defects
22 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What type of defect is a dislocation?

  • Two-dimensional defect
  • Three-dimensional defect
  • Zero-dimensional defect
  • One-dimensional defect (correct)
  • What is the term used for an extra portion of a plane of atoms in a dislocation?

  • Extra point
  • Full plane
  • Zero plane
  • Half-plane (correct)
  • In the context of edge dislocation, what is the line defined along the end of the extra half-plane of atoms called?

  • Extra line
  • Dislocation line (correct)
  • Extra plane
  • Dislocation center
  • What type of strain is experienced by the atoms above the dislocation line in an edge dislocation?

    <p>Compressive strain</p> Signup and view all the answers

    How does the magnitude of lattice distortion change with distance away from the dislocation line?

    <p>It decreases</p> Signup and view all the answers

    At positions far removed from the dislocation line, the crystal lattice is:

    <p>Perfect</p> Signup and view all the answers

    What is the term for the linear defect around which some of the atoms are misaligned?

    <p>Edge dislocation</p> Signup and view all the answers

    In the context of dislocations, what causes the atoms above the dislocation line to be squeezed together?

    <p>Compressive strain</p> Signup and view all the answers

    What term is used for the slight curvature of the vertical planes of atoms as they bend around the extra half-plane?

    <p>Localized lattice distortion</p> Signup and view all the answers

    What type of defect is represented by an extra portion of a plane of atoms within a crystal lattice?

    <p>Edge dislocation</p> Signup and view all the answers

    At positions far removed from the dislocation line, how would you describe the crystal lattice?

    <p>Virtually perfect</p> Signup and view all the answers

    What is the term used for the line that is defined along the end of the extra half-plane of atoms in an edge dislocation?

    <p>Dislocation line</p> Signup and view all the answers

    What is the deformation in which stress and strain are proportional called?

    <p>Elastic deformation</p> Signup and view all the answers

    What is the important design parameter used for computing elastic deflections?

    <p>Young modulus</p> Signup and view all the answers

    What represents the slope of a secant drawn from the origin to some given point of the stress-strain curve?

    <p>Secant modulus</p> Signup and view all the answers

    What does the magnitude of the modulus of elasticity measure on an atomic scale?

    <p>Resistance to separation of adjacent atoms</p> Signup and view all the answers

    What happens to the modulus of elasticity when increasing temperature?

    <p>Diminishes</p> Signup and view all the answers

    What is the term for the point at which stress-strain curve bends over in the plastic region?

    <p>Yield strength</p> Signup and view all the answers

    What type of deformation corresponds to the breaking and reforming of bonds with original and new neighbor atoms?

    <p>Plastic deformation</p> Signup and view all the answers

    For which type of materials is time-dependent elasticity called anelasticity?

    <p>Metals</p> Signup and view all the answers

    What is the ratio of lateral and axial strains defined as?

    <p>Poisson’s ratio</p> Signup and view all the answers

    What is the mechanism of plastic deformation for crystalline solids?

    <p>Slip involving dislocations</p> Signup and view all the answers

    More Like This

    Crystal Defects Quiz
    18 questions

    Crystal Defects Quiz

    SteadiestMelodica avatar
    SteadiestMelodica
    Use Quizgecko on...
    Browser
    Browser