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Intro To Engineering Materials

Subject : engineering
Instructions:
  • Answer 43 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 measure of a material's ability to undergo appreciable plastic deformation before fracture; may be expressed as percent elongation (%EL) or percent reduction area (%RA) from a tensile test.






2. The diffusion condition for which there is some net accumulation or depletion of diffusing species.






3. The diffusion condition for which there is no net accumulation or depletion of diffusing species.






4. The process whereby atoms of one metal diffuse into another.






5. The ratio of stress to strain when deformation is totally elastic; also a measure of the stiffness of a material.






6. The maximum engineering stress - in tension - that may be sustained without fracture.






7. Deformation that is non - permanent and totally recovered upon release of applied stress.






8. A linear defect associated with the lattice distortion created when normally parallel planes are joined together to form a helical ramp.






9. Atomic migration from a normal lattice position to an adjacent vacant lattice site or vacancy.






10. Prisms having three sets of parallel faces.






11. Atomic migration in pure metals.






12. Crystal structure with atoms located at all eight corners and a single atom at the cube center. Coordination # = 8. APF = 0.68.






13. Linear defect associated with the lattice distortion produced in the vicinity of the end of an extra half- plane of atoms within a crystal.






14. Having identical values of a property in all crystallographic directions.






15. Material transport by atomic motion.






16. The change in gauge length of a specimen divided by its original gauge length.






17. The manner in which atoms - ions - or molecules are spatially arranged.






18. Metals as well as nonmetals that have more than one crystal structure.






19. The measure of a material's resistance to deformation by surface indentation or by abrasion.






20. The curve that results when the concentration of a chemical species is plotted versus position in a material.






21. A three- dimensional array of points coinciding with atom positions.






22. The slope of the concentration profile at a specific position.






23. Atomic migration from interstitial site to interstitial site. Typically happens more frequently than vacancy diffusion.






24. 1.38e-23

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25. The total area under the material's tensile engineering stress - strain curve taken to fracture.






26. The stress required to produce a very slight yet specified amount of plastic strain.






27. The sum of the sphere volumes of all atoms within a unit cell divided by the unit cell volume.






28. Material in which the atoms are situated in a repeating or periodic array over large atomic distances.






29. The energy required to separate two atoms that are chemically bonded to each other.






30. Product of the calculated stress level and a design factor.






31. Time- dependent elastic deformation.






32. The instantaneous load applied to a specimen divided by its cross - sectional area before any deformation.






33. The instantaneous applied load divided by the instantaneous cross - sectional area of a specimen.






34. The capacity of a material to absorb energy when it is elastically deformed.






35. Exhibiting different values of a property in different crystallographic directions.






36. A homogeneous crystalline phase that contains two or more chemical species.






37. Deformation that is permanent or nonrecoverable after release of the applied stress.






38. Crystal structure with a hexagonal unit cell. Coordination # = 12. APF = 0.74.






39. Crystal structure with atoms located at each of the corners and the centers of all the cube faces. Coordination # = 12. APF = 0.74.






40. A stress used for design purposes; for ductile metals - it is the yield strength divided by a factor of safety.






41. The natural logarithm of the ratio of instantaneous gauge length to original guage length of a specimen being deformed by a uniaxial force.






42. The onset of plastic deformation.






43. The rate of diffusion or rate of mass transfer.