
For each of the following scenarios, determine:
Show ALL work on the relevant phase diagram
S1: Cu-Ni mixture with 50 wt% Ni at T = 900°C
S2: Cu-Ni mixture with 50 wt% Ni at T = 1300°C
S3: Cu-Ni mixture with 50 wt% Ni at T = 1400°C
S4: Pb-Sn mixture with 30 wt% Sn at T = 200°C
S5: Pb-Sn mixture with 30 wt% Sn at T = 100°C
S6: Pb-Sn mixture with 90 wt% Pb at T = 200°C

For each of the following scenarios, determine: What is (are) the phase(s) present? What is (are)...
Pb-Sn Phase Diagram (Solder Alloys) Slowly cooling down 1 kg solder alloy with 50wt%,Sn from 300°C to room! temperature (1) At 200°C, what are the phases and calculate the amount of each phase (2) At 100°C, what are the phases and calculate the amount of each phase Atomic percentage tin 10 20 30 40 50 60 70 80 90 400 327.502 300 231.9681 20 -Cu-Pb)- 19 183 61.9 97.5 (B-Sn) (a -Sn) 100 13° Pb 10 20 30 40 50...
Additional Problem 1: Consider the following binary phase diagram for the Cu-Ni system at 1 atm pressure (a) For XNfotal 0.3 at 1500 K, find XNt and Xw°, and estimate f and f (b) Starting from XNfotal = 0.3 at 1500 K, the system is cooled, and a (Cu,Ni) solid solution forms. Find XNi for the last drop of the liquid as it crystallizes Ni 10 TГ Cu - Ni 20 30 40 50 60 70 80 90 wt% 1800...
2) For the following Cu-Ni phase diagram, determine the compositions of each phase for an overall composition of 60 wt% Ni at 1300 °C. What happens when the temperature is increased to 1500 °C? 1600 1500 1400 a T(°C)1300 + 1200 7 1100 1000 20 L 40 60 80 wt% Ni 100
No. 12
20 80 60 80 100 Composition s 12. Cite the phases that are present and the phase compositions for the following alloys (a) 90 wt% Zn-10 wt% Cu at 400°C (750°F) (b) 30 wt% Pb-70 wt% Mg at 425°C (7950 ) (c) 2.12 kg Zn and 1.88 kg Cu at 500°c (930°F) (d) 37 lbn Pb and 6.5 Ibm Mg at 400°C (750 F)
4) Below is the phase diagram for Pb-Sn alloy. a) At 200 C°, determine the phases present at 10%Sn, 40%Sn and 80%Sn. (5 pts) b) At 200 C°, determine the composition of the phases for each weight percentage in (a). (5 pts) c) At 200 C°, determine the relative amount of each phase (weight fractions) for these points (5 pts) d) If you start cooling the system from 300 C° to 100 C°, what differences do you expect in the...
In the Al-Cu phase diagram, determine what phases are present
in the binary areas (white area).
Determine all the phase transformations happened in the
following phase diagram.
For a 20 wt% Cu alloy at 500 oC, determine: The phases
present
The phase compositions
The fraction of each phase
Draw microstructure of this alloy at 700 oC, 560 oC and 300
oC.
We are interested to design an alloy with heat treatable
characteristics. Please suggest a composition range and explain
why?...
The Sn-Pb phase diagram is reproduced below. 10 20 30 40 50 Weight % lead 60 70 1 80 85 95 90 1 350 3270 300 250 232° 200 183° (Pb) Temperature, °C 1.45(2.5) 26.1(38.1) 71 (81) 150 | (Sn) 100 93 (96) 50 96.8 (98.1) 0 0 Sn 10 20 30 70 80 90 40 50 60 Atomic % lead 100 Pb Suppose you wish to prepare an alloy containing primarily Sn-rich grains separated by regions of eutectic microconstituent,...
Question 1: (16 points: 4 pts each) A 45 wt% Pb - 55 wt% Mg alloy is slowly cooled from 700°C to 400 °C. (a) At what temperature does the first solid phase form? (b) What is the composition of this solid phase? c) At what temperature does the liquid solidify? (d) What is the composition of this last remaining liquid phase? Composition (at% Pb) 10 20 30 40 70 100 700 L 600 L + MezPo M 500 400...
14. Use the lead-tin phase diagram (below). A Sn-Pb alloy is heated to a temperature within the a+ liquid phase region. If the composition of the a phase is 10 wt% Sn, determine: The temperature of the alloy 275°C b. The composition of the liquid phase a. c. What is the maximum solubility of Sn in a and Pb in B? Sna = 18.3% Pog: 2.2 % d. What is the eutectic composition for the Pb-Sn system? Sn = 61.9%...
Due date: April 7, 2020 200 Solubaty limit- Homework #7 (Chapter 9: Phase Diagrams) 150 Liquid solution Ganes Solution sugar 100 1 50 1. Consider the Cu-Ni binary Liquid solution (syrup) phase diagram (see the following old figure) and answer the questions: A copper-nickel alloy of composition 70 wt% Ni-30 wt% 207 Cu is slowly heated from a temperature of 1300°C. Il (a) At what temperature does the Sugar 60 80 Water 100 first liquid phase form? (b) What is...