In: Mechanical Engineering
1.A materials fatigue resistance can be improved by
removing sharp corners in the geometric design of the component |
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introducing a residual compressive stress on the surface of the component. |
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operating the component at temperatures above its melting point |
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introducing surface flaws to the component |
2.What test is used to determine the toughness of a material under shock loading?
hardness test |
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Impact test |
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compression test |
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tensile test |
3.Martensite
is a phase that consists of lamellar arrangement of iron and cementite |
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is harder than pearlite |
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is harder than ferrite |
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has a high level of ductility |
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