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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 specific set of h






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






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






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






5. 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






6. 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






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






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






9. 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






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






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






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






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






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






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






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






17. 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






18. Crystallite materials with sizes of nanometers in length






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






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

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






22. The interaction of waves






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






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






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






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






27. 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






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 systematic reduction in intensity of diffraction peaks from specific lattice planes






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






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






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

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






34. 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






35. The distance between repeated planes in a lattice






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






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






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






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






40. Large - artificially produced monocrystals






41. 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






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






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






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






45. The direction that dislocation moves in






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






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






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






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






50. New planes formed after the material has undergone slip