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


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






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






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






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






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






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






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






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






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






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






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






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






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






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






17. 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






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






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






20. 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






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






22. Failure because of repeated stresses bellow the yield strength






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






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






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






26. 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






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






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






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






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






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






32. The study of crack growth leading to material failure






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






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






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






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






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






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






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






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






41. The ease with which a material deforms without breaking






42. 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






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






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






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






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






47. 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






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






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






50. 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