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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. 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






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






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






4. 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






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






6. The interaction of waves






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






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






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






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






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






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






13. 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






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






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






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






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






18. Materials whose order extends only to nearest neighbor atoms






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






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






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






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






23. The distance between repeated planes in a lattice






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






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






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


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






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






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






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






31. 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






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






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






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






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






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






37. Crystallite materials with sizes of nanometers in length






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






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






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






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






42. 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






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






44. New planes formed after the material has undergone slip






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






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






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






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






49. 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






50. A specific set of h