Fine pearlite of steel containing 0.45% C can be obtained after Hardening process Full annealing process Tempering O Normalizing O
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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.Please do it as early as possible. Name the microstructural products of a eutectoid iron-carbon alloy (0.76 wt% C ) that is first completely transformed to austenite and then cooled to room temperature at a rate of 1000 °C/sPlease show all work A 65Cu-35Zn brass is heated from 300°C to 1000°C. What phases are present at each 100°C interval?
- Sketch a phase diagram for two soluble components. Show the melting tem-perature of each element. Label all axes, curves, and zones.Material science Assuming this system forms a laminar type eutectic, determine the volume proportion of phases for an equilibrium solidified 50% Pb alloy. Sketch the expected microstructure.Indicate whether True/False. a) Interstitial solutes are effective in hardening FCC alloys but less effective than in BCC alloys.
- 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 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 50%Ni-50%Cu alloy is slowly cooled from 1400°C to 1200°C. Determine (1) At what temperature does the first solid phase form andwhat is the solid’s composition?(2) At what temperature does all liquid solidify and what is thelast remaining liquid’s composition?(3) At 1300°C, estimate the compositions of the solid andliquid.(4) At 1300°C, estimate the weight fractions of the solid andliquid.
- During a quenching process on a TTT diagram, we can transform pearlite into bainite. True or false?An alloy of 30 wt % Pb and 70 wt % Sn is slowly cooled from 250°C to 27°C: d) What is the amount and composition of each phase that is present at 183°C - ∆T ? e) What are the amounts of each phase present at room temperature? f) Draw the microstructure 183°C + ∆T and 183°C - ∆T in 2 cm diameter circle.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.