Temperature (°C) Composition (at% Ni) 1600 20 40 60 T 80 100 solid liquid 28 1500 Liquid 1453 °C 2600 1400 heater Liquidus line Solidus line 2400 1300- B 1200 2200 Temperature ("F) 1100 1085 °C 1000 2000 solid molten zone B 20 40 60 80 100 Composition (wt% Ni) (Ni) 01996 Encyclopaedia Britannica, Inc. The phase diagram of copper-nickel is shown. A Cu-Ni alloy bar has an original composition as indicated by point A in the phase diagram under the zone melting processing as shown by the right-hand side drawing. (a) When the heater passes the bar from left to right two times, determine the composition at the left end of the bar when it is cooled down to the room temperature. (b) If the initial composition of the alloy is indicated by point B in the phase diagram, what is the final composition at the right end of the solidified bar when the heater passed it three times from left to the right.

A 45 wt% Pb-55 wt% Mg alloy is rapidly quenched to room temperature from an elevated temperature in such a way that the high- temperature microstructure is preserved. This microstructure is found to consist of the a phase and Mg2Pb, having respective mass fractions of 0.65 and 0.35. Determine the approximate temperature from which the alloy was quenched. Use Animated Figure. °℃

Q1 / Two metals Beryllium (Be) and Silicon (Si) have melting points 1282°C and 1414 °C respectively, are completely soluble as liquids but completely insoluble as solids . They form a eutectic at 1090°C containing 61 wt% Si -39wt% Be? Determine the following:- 1- Draw the thermal equilibrium phase diagram and identify all phases are present in diagram ,then sketches what happens in microstructure when the alloys containing , a- 10wt% Si, b-70wt%Si , solidify completely. 2- Determine the composition and the amount of each phase for the alloy which contain 15 wt% Si-85wt% Be at 1150°C If the alloy is hypoeutectic determine the amount of eutectic at 600 °C? or hypereutectic and

Question: Construct the hypothetical phase diagram for metals A and B between room temperature (20°C) and 700°C given the following information: The melting temperature of metal A is 480°C. The maximum solubility of B in A is 4 wt% B, which occurs at 420°C. The solubility of B in A at room temperature is 0 wt% B. One eutectic occurs at 420°C and 18 wt% B–82 wt% A. A second eutectic occurs at 475°C and 42 wt% B–58 wt% A. The intermetallic compound AB exists at a composition of 30 wt% B–70 wt% A, and melts congruently at 525°C. The melting temperature of metal B is 600°C. The maximum solubility of A in B is 13 wt% A, which occurs at 475°C.                ●            The solubility of A in B at room temperature is 3 wt% A.

For a Fe-2.5 %C alloy , what is the temperature at which the first liquid forms on heating and also give the composition of the liquid at that temperature

A 50 wt% Ni–50 wt% Cu alloy is heated to a temperature within the a  liquid-phase region. If the composition of the alpha phase is 58 wt% Ni, determine the equation of mass fraction of solid phase ,WA

A binary alloy having 28 wt% Cu and balance Ag solidifies at 779°C. The solid consists of two phases a and B. Phase a has 9% Cu whereas phase ß has 8 % Ag at 779°C. At room temperature these are pure Ag and Cu respectively Sketch the phase diagram. Label all phases and temperatures. The melting points of copper and silver are 1083 and 9610 respectively s Pà) Estimate the amount of a and B in the above alloy at 779°C and at room temperature.) b) Calculate the mass fraction of phases for 40% Cu alloy at 300 °C and TR c) What is the composition of the alloys in (b)

1000 grams of steel containing 1.5 weight percent carbon is heated to complete melting.  After equilibrium is achieved, we slowly cool the alloy.  Determine the amount of pure iron or pure carbon we need to add to this 1000 gram alloy if we need to  have 100% pearlite at 720C upon slow cooling from complete melt.

An alloy consisting of completely soluble cadmium (Cd) and zinc (Zn) in the liquid state, but neither of them dissolves in each other in the solid state. the table shown below shows the solidification temperatures for various alloys of cadmium and zinc. 1. Draw the equilibrium diagram according to the information given and data in the table and indicating all important temperature and phases. 2. Find the percentage of each phases and percentage of constituents of the alloy that contain 60 % Zn and at a temperature 300 °C. 3. Find the melting point for the following alloys 20 % Cd, 80% Cd 4. Draw the internal structure, noting the phases of the following alloys A) 30 % Cd at 290 °C b) 60 % Cd at room temperature. % of Zinc in alloy Start of solidification ("C) End of solidification ("C) 0 10 14 20 30 40 50 60 321 290 266 275 293 310 328 345 70 80 90 100 362 390 401 419 266 266 266 266 266 266 266 266 266 266 266 266

Referring to Figure 1, answer the following: What are the liquidus and solidus temperatures for an 80%Pb20%Tl alloy? What is the composition of the solid solution phase for the aforementioned alloy once we hit the liquidus temperature upon cooling? For the same alloy above, use the inverse lever rule to calculate the %solid and %liquid at 325C