Figure 3.20 Portion of equilibrium phase diagram showing alloy composition X and associated solvus temperature Tș. - solvus line Ts a+ B х Composition
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Reproduce the binary phase diagram depicted
in Fig. 3.20. For the composition shown at X, mark on
the diagram approximate temperatures used for the three
main thermal process steps used in precipitation hardening:
solution treatment, quenching, and aging.
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- Draw thermal equilibrium diagram for the binary alloy system (Si-Au), from the following data:- a- Silicon melts at 1414 °C, and gold melts at 1064 °C. b-Eutectic is formed at 360°C containing 20 Wt% Si -80 Wt% Au, and identify all phases are present in the diagram c-Determine the amount of each phase for the alloy which consist of 60 Wt% Si- 40Wt % Au at 1200 °C and 800 °C ,then determine the amount of eutectic at 200 °C?Define the term equilibrium requirements?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
- e 1: ge 2: ge 3: B age 4: 4 ww Page 5: Consider an A-B phase diagram. At what temperature do we observe the maximum L solubility of A in B? Temp L+a L+B a 20% 100 A At the eutectic temperature At the room temperature At the melting point of beta At the melting point of alpha 50% 78% B a+B 100 B6. Match the proper description of the microstructure depicted below. Put the corresponding number/letter in the box beneath the microstructure. Assume equilibrium cooling conditions. Fe3C Fe3C Fe3CQI/ Draw a thermal equilibrium diagram for the binary alloy system (Si –Au), from the following data:- a- Si melts at 1414 °C, and Au melts at 1064 °C , and identify all phases are present in the diagram. b- Eutectic is formed at 360°C containing 20 Wt% Si -80 Wt% Au . c- Determine the amount of each phase for the alloy which consist 60 Wt% Si- 40Wt % Au at 1200 °C and 800 °C ,then determine the amount of eutectic at 200 °C?
- 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 325CFor alloy A-B of composition Co (C dot) is 33 at some temperature is found to consist of mass fractions of 0.75 and 0.25 for alpha and beta phases respectively. If the composition of the alpha phase is 15wt% B - 85 wt% A, what is the composition of the beta phase?Approximately how many degrees wide is the transition range at the 0.1 carbon alloy?
- Which line on the above phase diagram corresponds to the Solid-Liquid transition? AnswerQ3/ Draw thermal equilibrium diagram for the binary alloy (Pb- Sn) from the following data :- Lead melting at 327 °C, Tin melting at 232 °C, and the eutectic mixture consists of (61.9 wt% Sn- 38.1% Pb) at 183 °C. The maximum solubility of Sn in Pb 19.5 wt% at 183 °C, but the maximum solubility of Pb in Sn 2.6 wt% at 183 °C, and the solubility limits to each other's decreasing to zero at room temperature. (Assume solubility lines linear). Determine the following :- a- Identify all phases are present in the diagram. b- Calculate the amount of each phase for the alloy which consist of (60wt% pb -40wt% Sn) at 400 °C 200 °C ,and 100°C sn c- Calculate the percentage of eutectic for the alloy which consist of (60wt% Pb- 40wt% Sn) at 150°C 1Q6/ A. Show how the precipitation heat treatment of precipitation hardenable alloys differs from dispersion hardening process of composite material. B. What are the main constitutes of composite materials and what are the roles of each constitute?