Q3// Answer two only A) Within a cubic unit cell, sketch the following planes: (10 0J, (21 1) B) Within a cubic unit cell, sketch the following directions: [ 10 2),TO 1 2] C) Explain with drawing the stages during the solidification in metal.
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![Q3// Answer two only
A) Within a cubic unit cell, sketch the following planes: (10 0, (211)
B) Within a cubic unit cell, sketch the following directions: [10 2),T0 1 2]
C) Explain with drawing the stages during the solidification in metal.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F275fa74d-f45f-4f2c-a8f7-22841d20cea2%2Fd36aca94-bbbd-4b05-adce-1102a7185925%2Fhrxi5lh_processed.jpeg&w=3840&q=75)
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- Explain how grain boundaries are formed upon solidification of metals.3 Materials Science. From picture below.Describe in detail the phase transformations (showing cooling curves, corresponding optical backgrounds, etc.) that takes place during solidification of the following alloys:(a) 99% Cu - 1% Al(b) 96% Cu - 4% Al(c) 80% Cu - 20% AlWhat is the critical value of G to avoid constitutional supercooling for the directional solidification of an Al-Cu alloy, containing 3 wt.% copper, at a rate of 0.05 mm/s? For these alloys, k = 0.14, m = -2.6oC/wt% and D = 3x10-5 cm 2 /s. Here G is the thermal gradient into the liquid phase, k is the partition coefficient of the alloy, and D is the diffusivity of solute in the liquid phase.
- . A round casting is 0.2 m in diameter and 1 m in length. Another casting of the same metal iselliptical in cross section, with a major-to-minor axis ratio of 2, and has the same length andcross sectional area as the round casting. Both pieces are cast under the same conditions.What is the difference in the solidification times of the two castings?For the solidification of nickel, calculate the critical radius r* and the activation energy ΔG* if nucleation is homogeneous. Values for the latent heat of fusion and surface free energy are -2.53×109 J/m3 and 0.255 J/m2, respectively. The supercooling value ΔT for the homogeneous nucleation of Ni is 319 oC. The melting point for Ni is 1455 oC.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
- 2b) Figure 3 shows a cooling curve of Cadmium (Cd). Determine (i) the solidification temperature;(ii) the superheat;(iii) the cooling rate, just before solidification begins; (iv) the total solidification time; (v) the local solidification time; and(vi) If the cooling curve was obtained at the center of the casting sketched in the figure, determine the mold constant, assuming that n = 2.With a solidification factor of 0.97 x 106 s/m², the solidification time (in seconds) for a spherical casting of 200 mm diameter is...Chemistry is it possible to predict the metallic phases that may arise during the casting and solidification of any liquid metal (non ferrous metal) ?
- Why is it that inorganic glasses form upon relatively slow cooling of melts, while rapid solidification is necessary to form metallic glasses?a) If a nucleus forms with a radius less than critical radius for nucleation, it will disappear. Explain why?b) Explain the free energy diagram; explain how the total free energy of the solid-liquid system changeswith the size of the solid.Consider a Pb-35% Sn alloy. Determine: a) if the alloy is hypoeutectic or hypereutectic b) the composition of the first solid to form during solidification c) the amounts and compositions of each phase at 184 degrees C d) the amounts and compositions of each phase at 182 degrees C e) the amounts and compositions of each microconstituent at 182 degrees C f) the amounts and compositions of phase at 25 degrees C