E45ClassQuiz_25 2006

E45ClassQuiz_25 2006 - X• Crystal’s Theoretical...

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E45: Quiz 11/27/06 NAME:_______________________________________________________________ 1. Specify the Miller indices, {hkl}, of the crystallographic plane on which plastic flow occurs in a metal with the FCC crystal structure. Specify the crystallographic direction, <hkl>, in which plastic flow occurs in the fcc metal. {111}, <110> 2. The stress required to plastically deform a metal crystal is equal to
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Unformatted text preview: X• Crystal’s Theoretical Strength. What is the approximate value of X? 1/1000 3. (a) Name and (b) briefly describe the defect that is largely responsible for the low stress required to plastically deform a metal crystal (i.e., low relative to the theoretical strength of the crystal). (a) dislocation (b) A linear crystalline defect around which there is atomic misalignment...
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