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The formation enthalpy of a vacancy in Al is 0.66 eV. Here we assume this formation enthalpy of a vacancy does not change in typical

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The formation enthalpy of a vacancy in Al is 0.66 eV. Here we assume this formation enthalpy of a vacancy does not change in typical Al alloys. (1) calculate the equilibrium vacancy concentration at 500 C, which is a typical solution heat treatment temperature of Al alloys. (2) Calculate the increase in the equilibrium vacancy concentration as a ratio compared to that at room temperature (25 C)

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