QUESTION 20 Consider a 60 wt% Sn-40 wt% Pb alloy residing at 100°C, (a) Draw a tie-line and label the positions of the overall alloy "C", alpha "Ca" and beta "C8" phase compositions, (b) what phases are thermodynamically brought into fruition, (c) the value of the composition for the overall alloy, alpha and beta phase, (d) The concentration (or mass fraction) of the alpha "Wa" and beta "Wg" phases, (e) Would we be able to dubb the phase transition in concern "Hyper-Eutectoid Decomposition"? Justify your answer. NO TE: • Answer (part a) ON THE PHASE DIAGRAM. • ONLY provide what is being requested in parts (a to e). Anything outside of that will be ignored. Present answers in CLEAR BULLETPOINTS. 327°C 600 300 Liquid 500 232°C a +L 183°C B+L 400 18.3 61.9 97.8 300 100 a +B 200 100 20 40 60 100 Temperature ("C) Temperature ('F)

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QUESTION 20
Consider a 60 wt% Sn-40 wt% Pb alloy residing at 100°C, (a) Draw a tie-line and label the positions of the overall alloy
"C", alpha "Ca" and beta "C8" phase compositions, (b) what phases are thermodynamically brought into fruition, (c) the
value of the composition for the overall alloy, alpha and beta phase, (d) The concentration (or mass fraction) of the alpha
"Wa" and beta "Wg" phases, (e) Would we be able to dubb the phase transition in concern "Hyper-Eutectoid
Decomposition"? Justify your answer.
NOTE:
• Answer (part a) ON THE PHASE DIAGRAM.
• ONLY provide what is being requested in parts (a to e). Anything outside of that will be
ignored.
• Present answers in CLEAR BULLETPOINTS.
327°C
600
300
Liquid
500
232 C
a +L
200
B+L
400
183 C
18.3
61.9
97.8
300
100
200
100
20
40
60
80
100
Temperature ("C)
Temperature ("F)
Transcribed Image Text:QUESTION 20 Consider a 60 wt% Sn-40 wt% Pb alloy residing at 100°C, (a) Draw a tie-line and label the positions of the overall alloy "C", alpha "Ca" and beta "C8" phase compositions, (b) what phases are thermodynamically brought into fruition, (c) the value of the composition for the overall alloy, alpha and beta phase, (d) The concentration (or mass fraction) of the alpha "Wa" and beta "Wg" phases, (e) Would we be able to dubb the phase transition in concern "Hyper-Eutectoid Decomposition"? Justify your answer. NOTE: • Answer (part a) ON THE PHASE DIAGRAM. • ONLY provide what is being requested in parts (a to e). Anything outside of that will be ignored. • Present answers in CLEAR BULLETPOINTS. 327°C 600 300 Liquid 500 232 C a +L 200 B+L 400 183 C 18.3 61.9 97.8 300 100 200 100 20 40 60 80 100 Temperature ("C) Temperature ("F)
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