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10 Cards in this Set
- Front
- Back
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when a sample of steel containing ferrite is viewed under a microscope, the ferritic portion generally has a ________ appearance. light dark ridged needlelike |
light |
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when viewed under a microscope, pearlitic structures in steel resemble __________. patches needles ridges none of the above. |
ridges |
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when viewed under a microscope, martensitic structures in steel resemble __________. patches needles ridges white country roads |
needles |
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a sample of low-carbon steel with 0.1% carbon is compered to a sample of medium carbon steel with 0.4% carbon. assuming both samples have never been heat treated, the microscopic pattern of the medium-carbon steel will have ________. a lighter appearance in more areas many more dark sections a more needlelike appearance fewer ridges and more patches |
many more dark sections |
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in cementite-pearlight microstructure, the cementite portions resemble _________. patches needles ridges white country roads |
white country roads |
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at which percentage of carbon is the content of ferrite and cementite the closest to being equal balanced in a sample of pearlite? 0.1% 0.2% 0.4% 0.8% |
0.8% |
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which of the following structure resembles broken slabs of concrete when viewed under a microscope? Austenite Martensite Ferrite None of the above |
Austenite |
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which of the following structures has the highest percentage f carbon? Ferrite Cementie Pearlite all three structures have equal percentage |
Cementie |
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which of the following is the earliest step in preparing a metal sample for microscopic observation? rough polishing fine polishing molding grinding |
grinding |
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during etching, what is applied to the smooth surface of metal sample? carbon head acid none of the above. |
acid |
