Test your basic knowledge |

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. 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






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






3. Failure because of repeated stresses bellow the yield strength






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






5. 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






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






7. The final stage of creep - during which the rate of deformations accelerates rapidly and continues until rupture






8. An impact test similar to the charpy test in which the sample is aligned vertically with the notch facing away from the hammer






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






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






11. A value used to characterized creep based on time - temperature - and material- specific constants






12. 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






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






14. 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






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






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






17. The ease with which a material deforms without breaking






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






19. 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






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






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






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






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






24. The study of crack growth leading to material failure






25. Plastic deformation of a material under stress at elevated temperatures; occurs due to dislocations in the material






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


27. 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






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






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






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






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






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






33. A ratio of the force applied to a sample and the instantaneous length of the chain to the initial length of the chain






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






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






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






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






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






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






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






41. Materials that can plastically deform without breaking






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






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






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






45. The amount of energy lost as the test sample is destroyed during an impact test






46. A method used to measure the flexural strength of a sample






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






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






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






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