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Unformatted text preview: 6.) Why were the pennies quenched after a change was noticed during the heat treatment? 7.) Why did one penny fracture at low temperature when struck with a hammer, yet the other penny did not? 8.) Based on what you learned from answering question 3, choose the statement that is true. Diffusion of zinc in an FCC Cu-Zn alloy is faster than diffusion of copper. Diffusion of copper in an FCC Cu-Zn alloy is faster than diffusion of zinc. Diffusion of each element is equal as required by the mechanism of diffusion....
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- Spring '10
- Thermodynamics, April 20