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






2. Materials that can plastically deform without breaking






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






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






5. 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






6. 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






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






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






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






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






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






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


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






14. The ease with which a material deforms without breaking






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






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






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






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






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






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






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






22. Failure because of repeated stresses bellow the yield strength






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






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






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






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






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






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






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






30. 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






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






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






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






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






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






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






37. 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






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






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






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






41. The study of crack growth leading to material failure






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






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






44. 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






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






46. A limit placed on the accuracy of a reported mean - based on the number of samples tested - the standard deviation - and the desired level of confidence






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






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






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






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