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Modern Material Science And Engineering 4

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. Guidelines published by the American Society for Testing and Materials that provide detailed testing procedures to ensure that tests performed in different laboratories are directly comparable






2. The ratio of the maximum stress to the applied stress






3. The area contained under the elastic portion of a stress - strain curve - which represent how much energy the material can absorb before permanently beforming






4. A single blow test names after Charpy in which a notched test sample is broken by a swinging pendulum






5. The region on a stress - strain curve in which no permanent changes to the material occur






6. One of the many scales used to evaluate the resistance of a materials surface to penetration by a hard object under static force






7. Materials that fail completely at the onset of plastic deformation. these materials have linear stress - strain curves






8. The number of cycles at a given stress level that a material can experience before failing






9. The application of stress perpendicular to a crack - wich pulls the top and bottom potions in opposite directions






10. The region on the stress - strain curve in which the material has experienced a change from which it will not completely recover






11. The stress at which the material breaks completely during tensile testing






12. A period used to force the same aging processes to occur on a sample in a shorter amount of time






13. The stage in which the rate that dislocations propagate equals the rate at which the dislocations are blocked - resulting in a fairly linear region on the strain - time plot






14. The first stage of creep - during which dislocations in a material slip and move around obstacles






15. The study of crack growth leading to material failure






16. The sudden decrease in cross - sectional area of a region of a sample under a tensile load






17. Term that accounts for the increased stress applied to an elliptical crack whose length is much greater than its width






18. Stress values not involving the presence of stress raisers in the material






19. The degree of certainty in an estimate of a mean






20. The value that the stress concentration factor must exceed to allow a crack to propogate






21. A curve plotting the results of testing multiple samples at different stress levels that used to to determine the fatigue life of a material at a given stress level






22. The application of stresses parallel to a crack causing the top portion to be pushed forward and the bottom portion to be pulled in the opposite direction






23. A specific method of measuring the resistance of a materials surface to penetration by a hard object under a static force






24. The change in the slope of the strain - time plot at any given point during a creep test






25. A nonlinear - qualitative scaled used to evaluate the resistance of a materials surface to penetration by a hard object






26. The stress at the highest applied force on a stress - strain curve






27. Method used to determine fatigue by alternating compressive and tensile forces on the sample






28. Test that approximate the impact of an environmental variable on a material over time by exposing the material to a higher level of that variable for shorter times






29. A value used to determine if two distinct sets of examples are statistically different






30. The square root of the variance. this value provides more knowledge about the distance from the mean a random sample is likely to be






31. The slope of the stress - strain curve in the elastic region. aka Young's Modulus and Tensile Modulus






32. A property defining a materials resistance to a blow that is measured by an impact test






33. An estimate of the transition between elastic stretching and plastic deformation for a material without a linear region stress - strain curve






34. Stresses that act perpendicularly to the direction of the crack - causing the crack ends to pull apart and opening the crack further






35. The ratio of applied load to cross - sectional area






36. The stress level below which there is a 50% probability that failure will never occur






37. The stress at the point of transition between elastic stretching and plastic deformation






38. Relates the longitudinal deformation and the lateral deformation of material under stress


39. A method used to measure the resistance of the surface of a material to penetration by a hard object under a static force






40. A statistical table based on the degrees of freedom and the level of uncertainty in a set of reported sample values






41. Failure because of repeated stresses bellow the yield strength






42. Materials that can plastically deform without breaking






43. The ease with which a material deforms without breaking






44. The resistance of the surface of a material to penetration by a hard object under static force






45. The fracture toughness above the critical thickness in which the width of the material no longer impacts the fracture toughness






46. The ratio of the elastic energy to the strain at yielding - which determines how much energy will be used for deformation and how much will be translated to motion






47. The transition of some metals in which a change in temperature causes them to transform between ductile and brittle behavior






48. A property determined by measuring the change in the length of a sample to initial length of the sample






49. Cracks - voids - and other inperfections in a material that cause highly localized increases in stress






50. A statistical quantity that takes into account the random error from a variety of sources and provides infromation about the spread of the data