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






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






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






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






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






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






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






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






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






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






12. 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






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






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






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






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






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






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






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






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






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






22. The ease with which a material deforms without breaking






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






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






25. The study of crack growth leading to material failure






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






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






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






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






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






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






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






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






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






35. 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






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






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






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






39. 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






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






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 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






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






44. Materials that can plastically deform without breaking






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






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






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






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






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






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