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MATS 3011 Lecture Notes - Alpha Beta Gamma, Eutectic System, Cementite

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mauvedinosaur421
15 Jul 2014
School
UMN
Department
Materials Science
Course
MATS 3011
Professor
Bharat Jalan

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Document Summary

Peritectic gamma alpha + beta gamma is another solid phase, not liquid. Shown btwn 0 and 6. 7% (in steel and cast carbon ironthis is relevant region) If phase not given, look at phases on both sides of boundaryit"s most likely mix of those phases. -> alpha-fe (bcc) (ferrite) --> (912 oc) gamma-fe (fcc) (austenite) -->(1394 oc) delta-fe (bcc) Energy to form different phase < energy to dissolve something in it. Octahedral interstitial sites in fcc are bigger than tetrahetral sites in bcc. -> c more soluble in gamma-fe (fcc) b/c of bigger interstitial sites. Steel = 0. 008 - 2. 14 wt% c (for most steel, wt% c < 1%) Cast iron = 2. 14 - 6. 17 wt% c. 0. 0081 < c < 2. 14: called a eutectoid rxn if passes through eutectoid pt. gamma alpha + fe3c in gamma, c = 0. 76%

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Related Questions

3. What is printed to the screen when the following program is run? (6 points) public class Alias Test { public static void main(String[] args) { int) foo = {1,2,3,4,5}; int[] bar = {20, 21, 22, 23); int) chocolate = bar; bar[0] = 30; chocolate [1] = chocolate [0] + foo(0); System.out.println("Phase 1"); System.out.println (bar[0]); System.out.println (chocolate[0]); System.out.println (foo [0]); System.out.println (bar[1]); bar - foo; foo - chocolate; foo [31 - foo [2] + foo[1]; System.out.println("Phase 2"); System.out.println (foo [1]); System.out.println (foo [2]); System.out.println (foo [3]); foo = new int [10); foo [0] = 3; System.out.println("Phase 3"); System.out.println(chocolate[0]); System.out.println (chocolate[1]); System.out.println(chocolate[21); System.out.println(chocolate[3]); //WHAT IS PRINTED TO THE SCREEN IN THIS RUN? What is printed to the screen when the above program is run?