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






3. Crystallite materials with sizes of nanometers in length






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






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






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






7. 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






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






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






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






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






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






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






14. A specific set of h






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






16. 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






17. Materials whose order extends only to nearest neighbor atoms






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






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






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






21. New planes formed after the material has undergone slip






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






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






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






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






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






27. 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






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






29. The distance between repeated planes in a lattice






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


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






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






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






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






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






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






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






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






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






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






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






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






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






44. 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






45. 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






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


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






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






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






50. The direction that dislocation moves in