The solubility of tin in lead matches that required for precipitation hardening. Yet tin does not age-harden lead satisfactorily. Suggest a reason why it does not.
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The solubility of tin in lead matches that required for precipitation hardening. Yet tin does not age-harden lead satisfactorily. Suggest a reason why it does not.
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- Describe the phases present at the eutectic temperature when the overall composition is x(Cu)= 0.5Based 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? ExplainFor a 76 wt% Pb–24 wt% Mg alloy, make schematic sketches of the microstructure that would be observed for conditions of very slow cooling at the following temperatures: 575°C, 500°C, 450°C, and 300°C. Label all phases and indicate their approximate compositions.
- 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 .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)For a lead-tin alloy of composition 80 wt% Sn-20 wt% Pb and at 180 °C, do the following:(a) Determine the mass fractions of the α and β phases.(b) Determine the mass fractions of primary β and eutectic microconstituents.(c) Determine the mass fraction of eutectic β
- Is it possible to produce and iron-carbon alloy of eutectoid composition that has a minimum hardness of 200HRB and a minimum ductility of 25% RA? If so, describe the continuous cooling heat treatment to which the alloy would be subjected to achieve these properties. If it is not possible, explain why.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.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.
- Please show all work A 65Cu-35Zn brass is heated from 300°C to 1000°C. What phases are present at each 100°C interval?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.Q) A graph of your temperature versus time cooling curve. Discuss the indicators of solidification initiation and termination and the implied alloy composition(s) I have provided with the grpah of the tmep vs time cooling curve and the phase diagram please answer the above question accordingly in paragrahps