For each of the following provide: i) The phases present ii) The composition of each phase iii) The relative wt% of each phase a) 15 wt% Sn-85 wt% Pb at 100°C b) 1.25 kg Sn and 1.4 kg Pb at 200oC c)...
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)
For an alloy composed of 15 wt% Sn-85 wt% Pb and at 100°C, determine what phases are present, the composition of the phases and the relative amounts (in terms of weight fractions) of the phases. T(°C) 300 L (liquid) L + a 200 183°C T + B / 100 α + β 0 20 80 100 40 60 wt% Sn
(12 Question 2: points: 4 pts each) For a Lead-Tin (Pb-Sn) alloy of composition 85 wt% Sn - 15 wt % Pb and at 182 °C determine the followings: Show your calculation details in your answer and draw lines on the phase diagram to label the phases and compositions. a) Determine the mass fractions of a and B phases. b) Determine the mass fractions of primary B and eutectic microconstituents. c) Determine the mass fraction of eutectic B. Composition (at%...
Just part c please 2,) Using the Pb - Sn phase diagram, at the points indicated below, determine the followhg draw tie lines and indicate important values on diagram) I. The phases present II. The composition of each phase I. The relative amounts of each phase(expressed in weight percentages) 182°C eutectic. c= 85% Sn b) T= 200°C c- IL= 2,) Using the Pb - Sn phase diagram, at the points indicated below, determine the followhg draw tie lines and indicate...
6. A 2.0-kg specimen of an 85 wt% Pb-15 wt% Sn alloy is heated to 200°C (390°F); at this temperature it is entirely an α-phase solid solution, The alloy is to be melted to the extent that 50% of the specimen is liquid, the remainder being the phase. This may be accomplished by heating the alloy or changing its composition while holding the temperature constant. (a) To what temperature must the specimen be heated? (b) How much tin must be...
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...