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






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






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






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






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






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






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






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






9. A method used to determine the tensile strength - breaking strength - and the yield strength of a sample






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






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






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






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






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






15. The amount of flexural stress a material can withstand before breaking. measured through the bend test






16. 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






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






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






19. 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






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






21. 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






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






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






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






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






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






27. Materials that can plastically deform without breaking






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






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






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






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






32. 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






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






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 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






36. The study of crack growth leading to material failure






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






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






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






40. Failure because of repeated stresses bellow the yield strength






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






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






43. 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






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






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






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






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






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






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






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

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