Q/ Correct the under line words 1-Ferrous alloys above 6.67%ls has structure of FeC+ Cementite.

A copper-nickel alloy of composition 70 wt% Ni - 30 wt% Cu is slowly heated from 1250 °C. What is percentage of copper in the first liquid phase that forms? Use the Cu-Ni equilibrium phase diagram shown below. 1500 Temperature (°C) 1455° 1400 Liquidus L 1300 1280° α + L Solidus 1200 1100 1085° 1240° α 1000 Cu 20 40 60 80 Ni Weight percent nickel

In the iron-carbon alloy phase diagram as shown in Fig. 1, draw the microstructures with indicating the name of each phases existing at (a) - (h) point.

Topic: Equilibrium Phase Diagram QUESTION 1 A 50 wt% Pb-50 wt% Mg alloy is slowly cooled from 700C to 400C. (a) At what temperature does the first solid phase form? (b) What is the composition of this solid phase? (c) At what temperature does the liquid solidify? (d) What is the composition of this last remaining liquid phase? Composition (at% Pb) 10 30 40 70 100 700 1200 600 a +L Ma Pb M 1000 500 800 400 Mg Pb 600 300 400 200 a + MgPb 100 MgPb 200 MgPb 20 40 60 100 (Mg) Composition (wt% Pb) (Pb) 1 (5) aungeedue

stion 5 Iron (II) oxide (FeO) is a ceramic that has the same crystal structure as NaCl. Fyet wered Given: ked out of R(Fe2)= 0.087 nm and R(O )-0.132 Calculate the lonic Packing Factor (IPF) of FeO? Rag stion Select one Da. 0 14 Ob.0.12 OC074 o.021 8 05 E 0.59

5. Calculate the d-spacing of (111) plane in Cu. Copper has a fcc lattice structure and has an atomic radius of 2.31Å.

Some hypothetical alloy is composed of 25 wt% of metal A and 75 wt% of metal B. If the densities of metals A and B are 6.17 and 8.00 g/cm' respectively, whereas their respective atomic weights are 171.3 g/mol and 162 g/mol respectively, determine the crystalline structure of the alloy assuming a unit cell edge length of 0.332nm.

A plain-carbon steel contains 5.9 wt % hypoeutectoid ferrite.  What is its average carbon content?

Au and Ag form a substitutional solid solution. This means that the crystal structure of an Au-Ag alloy consists of Ag atoms substituting for Au atoms in the regular atomic positions of the FCC structure. For an Au-50 wt% Ag alloy, what fraction of the atomic sites does Ni occupy? NA=6.022e23   A.  None of the mentioned B.  32.31% C.  64.61% D.  50%

Why is iron generally harder and have higher yield strength (σy) when it is alloyed with carbon? a) Carbon forms an interstitial solid solution in iron and Fe-C bonds are very strong. b) Carbon forms an interstitial solid solution in iron and the C atoms bind dislocations. c) Carbon forms a substitutional solid solution in iron and Fe-C bonds are very strong. d) Carbon forms a substitutional solid solution in iron and the C atoms bind dislocations. e) Carbon is the base element for diamond, which is very hard.