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Anisotropic behavior can result from processing of metals. This means: |
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Definition
some properties of the material depend on its spatial orientation. |
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Extrusion is the process of: |
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pushing metal through a die to produce an object of constant cross section, such as a rod. |
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Forging is the process of: |
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compressing metal into a die to produce a desired shape. |
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Glass is commonly processed in a variety of ways, including all of the following except: |
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polymers that can be melted and reformed and are capable of being strengthened when their constituent molecules are aligned. |
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The process of strengthening metals usually results in |
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multiplication of existing dislocations. |
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In general, thermoplastics can be processed using many of the same techniques for processing metals, such as extrusion. (T or F) |
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In which step of annealing does the dislocation density remain unchanged? |
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What does cold working result from? |
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Increased dislocation density |
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Which is NOT an advantage of cold working a metallic material? |
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Corrosion resistance is improved |
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How much can a plate plastically deform during hot working? |
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An almost unlimited amount |
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What is a result of hot working? |
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Elimination of imperfections |
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What material can be hot worked at room temperature? |
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What reduces the recrystallization temperature? |
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A smaller initial grain size |
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How can you eliminate residual stresses in cold-worked metallic materials? |
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Stress-relief anneal the part |
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What is the second step of annealing? |
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What does annealing NOT accomplish? |
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Eliminating the dimensional accuracy |
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