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Modern Material Science And Engineering

Subject : engineering
Instructions:
  • Answer 50 questions in 15 minutes. 2 minutes extra for reading the instructions.
  • 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 first level of the structure of materials - describing the atoms present






2. 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






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






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






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






6. The third level of structure in materials - describing the sequencing of crystals at a level invisible to the human eye






7. Large - artificially produced monocrystals






8. The interaction of waves






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






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






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






12. The distance between repeated planes in a lattice






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






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






15. New planes formed after the material has undergone slip






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






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






18. A specific set of h






19. The size - shape - and arrangement of atoms in a three- dimensional lattice






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






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


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






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






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






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






26. Crystallite materials with sizes of nanometers in length






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






28. 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






29. The presence of both screw and edge dislocations separated by a distance in the same lattice






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






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






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






33. 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






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






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






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






37. 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






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






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






40. 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






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






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






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






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






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






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






47. 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






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






49. The direction that dislocation moves in






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






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