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






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






3. Crystallite materials with sizes of nanometers in length






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






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






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


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






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






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






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






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






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






13. The distance between repeated planes in a lattice






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






15. 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






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






17. Materials whose order extends only to nearest neighbor atoms






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






19. New planes formed after the material has undergone slip






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






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






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






23. The direction that dislocation moves in






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






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






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






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






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






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






30. 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






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






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






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






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






35. The interaction of waves






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






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






38. 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






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






40. 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






41. Large - artificially produced monocrystals






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






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






44. 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






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






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






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






48. 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






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






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