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Modern Material Science And Engineering

Subject : engineering
Instructions:
  • Answer 50 questions in 15 minutes.
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  • Match each statement with the correct term.
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This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. The interaction of waves






2. The first set of panes in a material to experience slip under an applied stress






3. Materials whose order extends only to nearest neighbor atoms






4. One of the bravais lattice that contains one atom in each corner of the unit cell as well as one atom in the center of the unit cell






5. A bravais lattice that has one atom in each of the 8 corners of the unit cell; less common than the other two cubic forms






6. The smallest subdivision of a lattice that still contains the characteristics of that lattice






7. Point defects that result when an atom in the lattice is replaced with an atom of a different element






8. Mechanism by which dislocations move in directions that are perpendicular to the slip plane






9. Clustering that occurs when a pure material cools sufficiently to self- support the formation of stable nuclei






10. The 14 distinct crystals structure into which atoms arrange themselves in materials






11. Provides a framework for the new atoms to follow in constructing a monocrystal






12. The fourth level of structure in materials - describing how the microstructures fit together to form the material as a whole






13. One of the bravais lattices that has one atom in each of the 8 corners of the unit cell and one atom on each face of the unit cell






14. Large scale lattice defects that occur from alterations to the structure of the lattice itself






15. The filling of a vancacy in the partial plane of an edge dislocation by an adjacent atom resulting in a shrinking of the crystal in the direction perpendicular to the partial plane






16. Point defects that result from the absence of an atom at a particular site






17. The amount of the unit cell occupied by atoms as opposed to void space






18. The systematic reduction in intensity of diffraction peaks from specific lattice planes






19. A flaw in the structure of a material that occurs at a single site in the lattice - such as vacancies - substitutions - and interstitial defects






20. The edge lengths and angels of a unit cell; describes the sizes and shapes of the lattices






21. Lattice defects caused by the addition of a partial plane into an existing lattice structure






22. Generalized equation used to predict the temperature dependence of various physics properties






23. The equations used to determine the critical resolved shear stress in a material

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24. Composed of both the slip plane and the slip directions






25. Point defects that occur when an atom occupies a space that is normally vacant






26. The second step in the formation of crystallites - which is dependent on temperature and can be described using the arrhenius equation






27. Tiny clusters of arranged atoms that serve as the frameworks for subsequent crystal growth






28. A numerical quantity developed by the American Society for Testing and Materials (ASTM) to characterize grain sizes in materials






29. New planes formed after the material has undergone slip






30. The movement of dislocations through a crystal - caused when the material is placed under shear stress






31. Crystallite materials with sizes of nanometers in length






32. A standard used to measure the spread in the peak of a diffractogram - measures at the intensity value corresponding to the half highest value in the peak






33. The distance between repeated planes in a lattice






34. Microscopes that focus a high- energy beam of electrons at the source and collect the back- scattered beam of these electrons






35. The density a material would have if it consisted of a single perfect lattice






36. The second level of the structure of materials - describing how the atoms are positioned in relation to one another as well and the type of bonding between them






37. Regions of a material in which atoms are arranged in a regular pattern






38. A nullification caused by two waves interacting out of phase






39. The use of light to magnify objects up to 2000 times






40. A means of relating the amount of spreading in a X- ray diffractogram to the thickness of the crystallites in the sample






41. A specific set of h






42. Formula that relates interplaner spacing in a lattice to constructive interference of diffracted X- rays

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43. Lattice defect that occurs when the lattice is cut and shifted by a row of atomic spacing






44. Correlation used to estimate the yield strength of a given material - based on grain size






45. For a slip to occur - a sufficient amount of stress must be applied to permanently deform the material






46. The increase in amplitude resulting from two or more waves interacting in phase






47. Most common of the non - cubic bravais lattices; having six atoms forming a hexagon on both the top and bottom and a single atom positioned in the center - between the two hexagonal rings






48. Large - artificially produced monocrystals






49. Homogeneous nucleation: grain boundaries: lattice/surface interactions:






50. An electron microscope that passes the electron beam through the sample and used the difference in the beam scattering and diffraction to view the object