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






2. 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






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






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

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






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






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






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






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






10. 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






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






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






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






14. The ease with which a material deforms without breaking






15. Failure because of repeated stresses bellow the yield strength






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






17. Materials that can plastically deform without breaking






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






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






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






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






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






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






24. 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






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






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






27. 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






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






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






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






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






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






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






34. The study of crack growth leading to material failure






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






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






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






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






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






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






41. 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






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






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






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






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






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






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






48. 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






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






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