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






2. 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






3. 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






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






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






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






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






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


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






10. The interaction of waves






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






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






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






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






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






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






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






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






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






20. The direction that dislocation moves in






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






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






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






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






27. 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






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






29. 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






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






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






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






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






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






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






36. Large - artificially produced monocrystals






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






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


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






40. 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






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






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






43. 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






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






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






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






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






48. A specific set of h






49. Materials whose order extends only to nearest neighbor atoms






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






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