E45ClassQuiz_22 2006 - What phase or phases are present in...

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E45: Quiz 11/17/06 NAME:_______________________________________________________________ T A = melting point of pure A; T B = melting point of pure B (a) What phase or phases would be present in an alloy of composition C O that is heated at a temperature between T 3 (=1200°C) and T O (=800°C) for a long enough time for the equilibrium structure to form? α (b) Next, the alloy is rapidly cooled (quenched) to room temperature by plunging the alloy into a large volume of water.
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Unformatted text preview: What phase or phases are present in the alloy after it is quenched to room temperature? (c) Next, the alloy is heat treated at a temperature of 600C, causing the precipitation of phase. What factor limits the rate at which phase forms? (i) Chemical free energy associated with the formation of ; ( ii) Surface energy associated with the formation of . T A T B T O A C O B Concentration of B 1.0 T 3...
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This note was uploaded on 09/09/2008 for the course ENGIN 45 taught by Professor Devine during the Fall '07 term at University of California, Berkeley.

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