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






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






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






4. Failure because of repeated stresses bellow the yield strength






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






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






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






8. 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






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






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






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






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






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






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






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






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






17. The ease with which a material deforms without breaking






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






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






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

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22. 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






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






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






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






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






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






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






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






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






31. Materials that can plastically deform without breaking






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






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






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






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






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






37. 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






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






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






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






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






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






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






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






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






46. The study of crack growth leading to material failure






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






48. 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






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






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