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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 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






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






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






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






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






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






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






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






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






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






12. The study of crack growth leading to material failure






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






14. Materials that can plastically deform without breaking






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






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






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






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






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






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






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






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






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






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






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






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






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






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






31. 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






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






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






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






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






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






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






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






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






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






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

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






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






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






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






46. 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






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






48. The ease with which a material deforms without breaking






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






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