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Modern Material Science And Engineering

Subject : engineering
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

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 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






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

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3. The distance between repeated planes in a lattice






4. Materials in which the entire structure is a single unbroken grain






5. The direction that dislocation moves in






6. The first level of the structure of materials - describing the atoms present






7. Crystallite materials with sizes of nanometers in length






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






9. The line extending along the extra partial plane of atoms in an edge dislocation






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






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






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






13. Large - artificially produced monocrystals






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






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






16. A point defect found in ceramic materials that occurs when a cation diffuses onto an interstitial site on the lattice






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






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






19. The ares of a material that separate different crystallite regions






20. The clustering of atoms around an impurity that provide a template for crystal growth






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






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






23. A hypothetical structure accounting for irregularities in the boundaries between crystallites






24. A numerical system used to represent specifics planes in a lattice






25. A specific set of h






26. The interaction of waves






27. 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






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






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






30. The lowest stress level at which a slip will begin in the material






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






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






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






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






35. A point defect that occurs in ceramics when both a cation and an anion are missing from a lattice






36. A mathematical representation of the magnitude and direction of distortions in a lattice caused by dislocations






37. 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






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






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






40. The process of forming small aligned clusters of atoms that serve as the framework for crystal growth






41. 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






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






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






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






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

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46. 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






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






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






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






50. Materials whose order extends only to nearest neighbor atoms