At 660°C the fractional concentration of vacancies in aluminum is 9 × 10-5. The energy for vacancy formation is therefore: a. 0.72 eV b. 1.44 eV c. 0.79 eV d. 0.75 eV e. 0.68 eV

Q: Maximum solubility in FCC austenite at 1147 °C is 2.04 wt% 2.14 wt% 14.2 wt% O 0.022 wt% O

A: Maximum solubility in FCC austenite at 1147 °C will be ,

Q: Describe the phases present at the eutectic temperature when the overall composition is x(Cu)= 0.5

A: The detailed phase diagram of Ag-Cu is:

Q: A 80%Ag-20%Cu alloy is slowly heated from room temperature (25°C). Determine (1) At what…

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Q: For an alloy containing 40% p Sn - 60% p Pb at a temperature of 150°C: (a) Which phases are gifts?…

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Q: For a Fe-2.5 %C alloy , what is the temperature at which the first liquid forms on heating and also…

A: Given: Fe-2.5 %C alloy

Q: For a hypothetical material, experiments show that a sample containing 1 billion atoms has 40…

A: Given; Number of atoms (N) @600° C is 1 billion (1×109 )  Numbers of vacancies (Nv) @600° C is 40…

Q: The mass fraction of eutectoid cementite in a hypereutectoid iron-carbon alloy (just below its…

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Q: A 50 wt% Ni–50 wt% Cu alloy is heated to a temperature within the a  liquid-phase region. If the…

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Q: A piece of titanium metal with a mass of 20.8 g is heated in boiling water to 99.5°C and then…

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Q: A 1020 steel contains 0.20% carbon is carburized by a source that maintains a surface carbon content…

A: Given that, Carbon content at surface, Cs=2 %CInitial carbon content,  Co=0.2 % CCarbon content at a…

Q: If a nucleus forms with a radius less than critical radius for nucleation, it will disappear.…

A: Part (a) The Gibbs free energy change is given by, ∆Gc=16πγ33∆gv2 Here, ΔGc is the Gibbs free energy…

Q: Q3/ A- What are the important reactions in( Fe-C) system? B- Calculate the activation energy for…

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Q: Determine the activation energy for vacancy formation in aluminum, if the equilibrium number of…

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Q: I want to know the formula for calculating the molar entropy change of aluminium giving the initial…

A: The Clausius statement for the second law of thermodynamics states that it is not possible to…

Q: H.W. A copper-nickel alloy of composition 70 wt% Ni–30 wt% Cu is slowly heated from a temperature of…

A: Below figure shows the Cu-Ni phase diagram and a vertical line constructed at a composition of 70…

Q: Q17: Calculate the number of vacancies per cubic meter in gold at900°C. vacancy formation is 0.98…

A: The answer is in the next step

Q: b) At a temperature just above the isotherm at 1830C, for the 30 wt% Sn Alloy, calculate the…

A: Given data: The temperature of the composition at 183°C. The composition weight% of Sn alloy is,…

Q: For alloy A-B of composition Co (C dot) is 33 at some temperature is found to consist of mass…

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Q: Question: For 5.7 kg of a magnesium–lead alloy of composition 50 wt% Pb–50 wt% Mg, is it possible,…

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Q: If 500 g of a 40 wt % Ag - 60 wt % Cu alloy is slowly cooled from 1000°C to just below 780°C: (a)…

A: If 500g of a 40 w% Ag - 60 wt% Cu alloy is slowly cooled from 10000C to just below 7800C; (a) How…

Q: B/ Aluminum (Tm=660 OC) and Silicon (Tm=1410 OC) were fully dissolved in each other in the liquid…

A: Given: The melting point of pure Al with 0% Si, Tal = 660°C The melting point of pure with 0% Al,…

Q: For a Pb-30% Sn alloy, determine the phases 400 present, their amounts, and their compositions at…

A: Data given-  Pb - 30 % Sn alloy  Temprature = 300°C ,200°C , 0°C

Q: The mass fraction of eutectoid cementite in a hypereutectoid iron-carbon alloy (just below its…

A:

Q: A 50 wt% Ni–50 wt% Cu alloy is heated to a temperature within the a  liquid-phase region. If the…

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Q: How would I... Determine the composition of aluminum and silicon (%Al/%Si) to melt the Al-Si…

A: what you are looking for is the eutectic point in a eutectic reaction a liquid phase transforms into…

Q: 1. Calculate the mass fraction fα of α of Fe-0.45% C at 750 °C by the lever rule.   Draw the…

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Q: Find the percentages of the phases of the alloy "1" in the figure at temperatures T1, T2 and T3.

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Q: Which of the following pairs can be considered to have the same phase? O A. Water and ice in a cup…

A: The word ph=ase refers to a physically homogenous condition of matter that has a certain chemical…

Q: The vacancy concentration for a metal A with an activation energy Q is 2x10-5. Calculate the vacancy…

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Q: 3. For the regions and points on the Fe-C phase diagram given bellow, write the corresponding phases…

A: The reaction and corresponding composition phases are written from diagram as,

Q: . . is an example of an solid solution with a B.C.C structure. O Molybdenum- Tungsten O Gold- Silver…

A: Solid solution is a mixture of two types of atoms in a crystalline.  B.C.C structure is a body…

Q: An alloy of 30 wt % Pb and 70 wt % Sn is slowly cooled from 250°C to 27°C: d) What is the amount…

A: From the above Graph i.e. Temperature vs Weight % tin Given that Composition of Pb is 30% and Sn 70%…

Q: RD Which line on the above phase diagram corresponds to the Solid-Liquid transition? Answer P.

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Q: Consider de-oxidation by the addition of ferromanganese (60 percent Mn) to molten steel at…

A: When the steel is partially deoxidized with magnese,then the iron also participates in the reactions…

Q: Use the phase diagrams for Cu-Ni and Cu-Ag systems below to answer the question: Based on the…

A: The strength of copper, nickel, and silver is 20 ksi, 8.56 ksi, and 6.52 ksi respectively.  The…

Q: Suppose an alloy consists of a 75 wt% Sn-25 wt% Pb. i. List the phases present in the alloy at 185…

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Q: 100 (iv) Given that the average density of a phase is determined as Pa = calculate the PA PB volume…

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Q: Determine the composition of the phases;

A: Phase Equilibrium: Equilibrium is the lowest energy state for a given T, P, and composition (i.e.,…

Q: A copper-nickel alloy contains 38% by weight of Cu and 62% by weight of Ni and is at 1330 ° C. Using…

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Q: 1. Factors determining the formation of substitutional solid solution 2 What main by Diclogaris

A: Disclaimer: “Since you have asked multiple questions, we will solve the first question for you which…

Q: ron (Fe) undergoes an allotropic transformation at 912°C: upon heating from a BCC [ alpha phase) to…

A: Given:RBCC=0.12584 nmRFCC=0.12394 nm

Q: Determine the fraction of eutectoid cementite with 0.84 wt.% C in the iron-carbon alloy.

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Q: A 45 wt% Pb-55 wt% Mg alloy is rapidly quenched to room temperature from an elevated temperature in…

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Q: A magnesium-lead alloy of mass 7.5 kg consists of a solid a phase that has a composition just…

A: Given data: m=7.5 kg Need to determine the mass of lead alloy and amount of alpha phase dissolved.

Q: B/ Aluminum (TM3D660 OC) and Silicon (Tm-1410 OC) were fully dissolved in each other in the liquid…

A: Given data:

Q: Calculate the number of vacancies/cm³ are expected in copper at 831 °C. The energy for vacancy…

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Q: Calculate the ratio of the number of vacancies in equilibrium at 27 C in aluminum to that produced…

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Crystalline Imperfections

The crystalline imperfections are described as the geometrical defects in the crystal due to incorrect arrangement of atoms, impurity, vacancy, and many more. It is not possible to achieve a perfect or ideal crystal, practically.