9503 - 3 fcc(ll l F E L f t 9 1/2[l i0 ~ ~ $ t o t a l dislocation ~ f i ~ N 8 ~ l g B f f i p a r t i a ~ ~ F l J(a 1/6[12 11 1/6[2111(c 1 6 i 2 i

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3. fcc &@(ll l)FELft9 1/2[l i 0]~~$%(total dislocation) J ~fi@[email protected](partial)~~F ? (a) 1/6[12 11, 1/6[2 1 11 (b) 11611 2 11, 1/61? 1 i] (c) 1/6[i2il, 116[2 111 (d) 1/6[1211, 1/6[21 (el 1/6[12 11, i/6[2i 4. f#&-j?J J (1 11)FEk-B 1/64 12> ~ffi~#F~X#@(cross slip)%!J(ll T)qmz-B 1/64 12> 3 l53Z49F , [email protected]%@(st~r-rod)[email protected]% (a) 1/6[i io] (b) 1/6[1 TO] (c> 116 [I To] (d) 116 [IIO] (e) 1/6[ioi] 7. &[email protected](grain growth>R , &EA/~\(D)R%~"S'~(~)[email protected]@R~% (a) D c~ D cc fO.' (c) D t-' (d) D t I (e) D t-* 9. When a binary alloy is formed between A and B atoms, there are three bonding energies in the system - EAA, EBB, and EAB representing the bonding energy between A-A atom pair, B-B atom pair, and A-B atom pair, respectively. For the system to segregate or precipitate, the usual conditions is (a) EAA > EAB > EBB CAB '> (EAA~EBB)~~ (c) CAB << (d) EAB < EAA+EBB (e) none of the above.
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10. In the Kirkendall effect (diffusion couple), which of the following description is wrong. (a) The effect confirms that the vacancy mechanisms the major diffusion mechanism for substitutional solid solution (b) The region in tension can accompany pore formation (c) Element with higher melting temperature usually diffuses faster (d) On the side of slower moving species, the region is in compression (e) none of the above. 11. The internal friction method is used to measure the interstitials diffusivity. Assume that the stressing frequency is f (llf= z,) and the mean time of stay for an interstitials is 7,. What is the condition for maximum energy loss? (a)f - 2, Cb) %>fa (c) zp < 7, (d) - TO. (e) none of the above. 12. For the alloy system being capable of forming metallic glasses, what characteristics does the phase diagram of the system usually have? (a) intemetallic compound (b) high peritetic point (d) deep monotetic point (e) deep eutectic point. (c) rnisibility gap 13. Which of the following is not an important factor that determines the lamellar spacing in the case of simple plate-like lamellar eutectic freezing? (a) supercooling (b) surface energy between the lamellar (d) solute di ffusivity (e) none of the above. (c) enthalpy of freezing 14. Which of the following is not the characteristics of the Martensitic transformation? (a) reversible characteristic athermal transformation (c) rational nature of the habit plane (d) complexity of the deformation (Bain distortion, shear deformation, rotation of the transformed lattice) (e) none of the above. 15. Which of the following factors is not important in the discussion of nucleation of a new phase from a solid matrix (a) surface energy of solid fiee energy change in forming the critical embryo (c) strain energy (d) temperature (e) heterogeneous sites
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a2 sjaj,S&z #+€I R~ 1-3 x 17 j$ X 3 R *a& (g*$t;] fij+g 16. Which of the following description about the Iron-Carbon alloy system is wrong? (a) Austenite is FCC Fe (b) Ferrite is BCC Fe (c) Pearlite consists of plates of Fe3C in the matrix of femte (d) The growth of pearlite resemble that of the eutectic freezing (e) none of the above 17. What are the indications of Davisson-Germer experiment?
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This note was uploaded on 10/18/2010 for the course EECS 216 taught by Professor Davewinn during the Spring '10 term at 카이스트, 한국과학기술원.

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9503 - 3 fcc(ll l F E L f t 9 1/2[l i0 ~ ~ $ t o t a l dislocation ~ f i ~ N 8 ~ l g B f f i p a r t i a ~ ~ F l J(a 1/6[12 11 1/6[2111(c 1 6 i 2 i

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