q5s03 - b. interstitial solid solution of carbon in iron c....

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Home Introduction Policies Resources Requirements & Grading Syllabus Assignments Handouts Discussion Web Links Distance Learners Contact MSE 200 Quiz 5 1. For a phase to be stable, the free energy should be
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a. zero b. minimum c. maximum 2. Along a phase boundary between two phases, the free energy of the phases are a. different b. zero c. equal 3. When NiO and MgO are mixed together, the number of components is a. 3 b. 2 c. 4 4. Mg and Cd are both metals, divalent, hcp and size factor is close to 10%. The phase diagram should show a. limited solubility b. very high solubility c. no solubility 5. Duralmin alloys gain their strength from a. formation of coherent precipitates b. quenched copper atoms in the lattice of aluminum c. formation of noncoherent precipitates 6. Ferrite phase in iron-carbon diagram is a. an intermetallic compound between iron and carbon
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Unformatted text preview: b. interstitial solid solution of carbon in iron c. substitutional solid solution of carbon in iron 7. Solubility of carbon in austenite compared that in ferrite is a. much lower b. equal c. much higher 8. Pearltitic steel has a composition of a. 0.18% carbon b. 0.8% carbon c. 1% carbon 9. The very hard and brittle phase in iron-carbon system is a. ferrite b. austenite c. cementite 10. Microstructure of medium carbon steels cooled slowly consists of a. pearlite b. ferrite and pearlite c. cementite and pearlite 11. Rails and other hard and wear resistant steels are made of a. low carbon steel b. medium carbon steels c. high carbon steels 1 ( b) 2 ( c) 3 ( b ) 4 ( b) 5 ( a ) 6 ( b ) 7 ( c ) 8 ( b) 9 ( c ) 10 ( b) 11 ( c )...
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q5s03 - b. interstitial solid solution of carbon in iron c....

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