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Materials_Test3 - 1(10 points Answer the following in 1-2...

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1. (10 points) Answer the following in 1-2 sentences. a. A dislocation in a BCC solid has a Burgers vector along the direction [1 0 1]; and is parallel to [0 10]. Is this an edge, screw or mixed dislocation? [, 0\ i. lo , 01 -:c 0 \0 I: () ""() ~ .L d ""'>\ Eo3~ \)\~\oc..Ct\\O" \ --"'-" / b. What is shot peening? What is its primary use? "'S~o\- ~e.f..'<'1\"(\~ \J '\'(,<,\}Oc.\\,,<) GO: me..\-cl the above system? J e. The Cu and Ni solid solution is known as a binary isomorphous system. i. Why do we use the term binary? 'fJ \00.<;:'1 \~ '0sed be.<:.<J.uS-e.. \"'~ Q.or\\a.\ W'::, \wo e..\e.(\'\~f'\'S ii. Why do we use the term isomorphous? \ ~r<\o(' ~ '<>D\J~ \ <::. v ~e..d \Je..c..o.v s,< ~v QfId ~ \ QH... t(;H,('\:>\~\'<:,-\y -So\\)~\~ \'f\ €.6<:..n \'<1 0. ~a \;e\. ~O\v \ \OY\ ~\c..\e.. " Page 2 of 9
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6. (5 points) For the phase diagram shown, clearly identify with the name and write down ALL the invariant reactions using the con"ectsymbols and convention. 15 20 25 I 1400 2500 y+ L ". ~.. 1200' - 1147"C c: - . 2000 ~ 5 ro :v c- E '" I- u y, Austenite , 2.14 OJ ::; 1000 '" 9- 0: '" I- 912'C 1500 727'C Cementite (Fc3C) -- ~ 1000 400 a (Fe) I 2 3 4. Composition (wt% C) 5 6 6.70 . :' ',,'; TIll: iron-iron carbide phast: diagram, [Adapted from Biliary Alloy Phase Diagra/1/s. 2nd edition, Vol. 1.T. B. Massalski (Editor-in-Chief). 1990. Reprinted hy permission of ASM International. Materials Park, OH.] Page 7 of 9
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7. (10 points) The microstructure of a copper-silver alloy at 7750 C consists of primary
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