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- Compare the Cu-Ni binary phase diagram with the Al2O3-Cr2O3 binary phase diagram. Why are they so similar? HINT: Review the Hume-Rothery rules.What is meant by a phase? Describe an example. And what is the equilibrium phase diagram?Describe the phases present at the eutectic temperature when the overall composition is x(Cu)= 0.5
- What is a peritectic phase diagram? Draw a typical equilibrium diagram for a eutectic type of system with limited solid solubility and explain its important features.Consider the binary Magnesium-Lead phase diagram below.Based on the phase diagrams, estimate the solubilities of Ni, Zn, Al, Sn, andBe in copper at room temperature. Are these solubilities expected in view ofHume-Rothery’s conditions for solid solubility? Explain
- According to the binary eutectic Pb-Sn phase diagram for the alloy of having 25 wt% Sn at 200°C determine the phase weight fractions.What are the effects of alloving elements on Fe-C binary phase diagramWhat is the crystal structure of martensite? Why can you not find a martensite phase region in the Fe-Fe3C phase diagram? What is the distinct feature of martensitic transformation?
- Consider the binary eutectic copper-silver phase diagram shown below. Make phase analysis of a 80 wt % Ag–20 wt% Cu alloy at the temperatures (a) 900°C, and (b) 780°C-ΔT. In the phase analysis include: (I) phases present, (ii) chemical compositions of phases, (iii) mass fractions of phases, and (iv) sketch of microstructure.For a steel with a 0.2 wt%C, what is the mass fraction and composition of phases at 600 (Please draw connections on the graph)A 80%Sn-20%Pb alloy is melted fully at 300°C and then slowly cooled down to 182°C. Sketch the microstructures at 300°C, 200°C, and 182°C, respectively. Label all phases and indicate their approximate compositions. Also, determine the follows for this alloy at 182°C. (1) The weight fractions of α and β phases.(2) The weight fractions of primary β and eutectic structure.(3) The weight fraction of eutectic β .