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






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






3. 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






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






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






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






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






8. The study of crack growth leading to material failure






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






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






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






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






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






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






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






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






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






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






20. 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






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






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






24. 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






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






26. 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






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






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






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






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






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






32. Failure because of repeated stresses bellow the yield strength






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






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






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






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






37. Materials that can plastically deform without breaking






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






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






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






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






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






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






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






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






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






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






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






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






50. The ease with which a material deforms without breaking