Why are Ni3Al (γ') precipitates particularly effective at strengthening nickel-based superalloys?

Q: A nitriding heat treatment of a BCC steel normally requires 2 h at 600 °C. What temperature would be…

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Q: Define eutectic, eutectoid and peritectic reactions with the examples

A: Iron carbon diagram represents the behaviour of iron with respect to the temperature and the…

Q: Why the Limestone is used into the blast fumace to produce pig iron? Why the Aluminium has…

A: (1) Limestone is used to remove impurities in the furnace and the main impurity of the blast furnace…

Q: To what temperature should hypoeutectoid plain carbon steel be heated for hardening purposes…

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Q: Why does the tensile strength of steel, which contains only austenite at room temperature, differ…

A: Ans 1:-The final microstructural change in hot deforming process  of steel is the transformation…

Q: f) For the Ag-20% Cu and Ag-80% Cu alloy; from 1100°C to room temperature,

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Q: How a heat treatment process needs to be carried out to obtain a   martensite structure in steel?

A: Martensite form is a hard phase of steel. To obtain martensite structure the steel is heated to a…

Q: iron-carbon alloy

A: According to above figure, the tabulation for Brinell hardnesses and…

Q: What are they and what is their application in the production of the following steels: TTT diagrams…

A: TTT Diagram of non-eutectoid steel: It is known as the Time-Temperature Transformation curve,…

Q: Suppose you are asked to manufacture a critical component based on a nickel-based super-alloy. The…

A: GIVEN: Manufacture a critical component based on nickel based super alloy

Q: 1- Examine carefully the microstructure of the specimens? 2- Draw nearly the microstructure with Mag…

A: What is microstructure? The microstructure is a very small scale structure of a material at the…

Q: b) Indicate corresponding cooling rates ( fast, mid-range, slow) and heat treatment c) Indicate a…

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Q: The Fe-C phase diagram is given: How much of the Primary phase for a Fe-0.55% C alloy forms at…

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Q: What type of grain structure in terms of chemical composition does non equlibrium cooling produces…

A: To choose: The correct answer.

Q: What is a complementary solutin?

A: In general the solution of a non-homogeneous equation holds two terms the complementary solution and…

Q: Comparison of treatment processes (annealing, normalizing, hardening and tempering) according to…

A: Heat treatment processes: Those processes that alter the mechanical properties of steel by varying…

Q: Is it possible to have an iron-carbon alloy for which the mass fractions of total cementite and…

A: Lever rule in phase diagrams are used to determine the mole fraction of each phase in the materials.…

Q: What are the rules which govern the formation of substitutional solid solutions?

A: Hume - Rothery Rules govern the formation of substitutional solid solution - 1. The crystal…

Q: To produce martensite, do you need to use a very slow cooling rate? Why or why not ?

A: Heat treatment is the process in which metal heat without reaching its molten point and then cool it…

Q: Activity# 03: Pourbaix diagram for Iron at 25-C. Circle and label the pure redox reaction, pure…

A: Pourbaix  of Iron at 25°C

Q: Nickel is extensively used in alloy steels for engineering purposes, generally in quantities up to…

A: Given: To find the most appropriate option.

Q: Excellent combinations of hardness, strength, and toughness are obtained from bainite. One heat…

A: The eutectoid composition of austenite is approximately 0.8% carbon; steel with less carbon content…

Q: ) Interstitial solutes are effective in hardening FCC alloys but less effective than in BCC  alloys.

A: When a solute atom is added to the structure of the material, it increases the mechanical strength…

Q: Calculate the critical radius of precipitates for which an Al--Mg alloy containing 10% Mg will be…

A: Solution:

Q: Explain the solidification of 50Pb-50Sn alloy

A: The 50Pb-50Sn is a solder alloy and it is used for normal soldering of brass, electric meter and tin…

Q: 1)What is types of cast iron? Explain detail with; a)Elemental composition b)Production method…

A: 1 2

Q: What is the crystal structure of martensite? Why can you not find a martensite phase region in the…

A: The crystal structure of the martensite is Body-Centered Tetragonal (BCT). It is a Body-Centered…

Q: At longer annealing times at appropriate temperatures, larger grains consume smaller ones. Summerize…

A: Annealing -  Annealing is a heat treatment process generally use for steel structures. In annealing…

Q: The majority of automobile alloy wheels are to be produced from A356 aluminum alloy by low pressure…

A: Low pressure die casting (LPDC) is method of casting that generally takes place in the space where…

Q: A steel contains 18% pearlite and 82% primary ferrite at room temperature. Estimate the carbon…

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Q: (a) What effects does it have on the microstructure? (b) How does this affect dislocation movement?…

A: Given: Quenching To determine: Define quenching. (a) What effects does it have on the…

Q: Draw Fe-C binary phase diagram and compute percentage of the phases in eutectoid steel.

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Q: I. A full annealing is often utilized in low- and medium-carbon steels II. A ferritic transformation…

A: The explanation of all three statements is given below. (I) The term full annealing is a heat…

Q: e) What is the% C ratio of two different steels with 80% and equal austenite content at 724 C?

A: Austenite:  It is a solid solution of carbon and other constituents in a specific form of iron…

Q: On modern large aeroplanes structure where can we find a more frequent use of titanium alloys? And…

A: On modern large aeroplanes structure titanium alloys are used in aircraft engines and frames.

Q: -What is the reason for the name white cast iron?

A: How cast iron is produced.  The pig iron that is raw form of iron is obtained from blast furnace…

Q: Lead-Tin (Pb-Sn) alloys are used in soldering applications. Draw phase diagram and Distinguish…

A: The phase daigram of the Lead and Tin (Pb-Sn) is shown below.

Q: Describe a method by which “ODS” alloys are produced and explain why it is not possible to cast…

A: Oxide dispersion strengthened (ODS) alloys, usually produced by a dispersion of nano-sized rare…

Q: On the right side of the iron-carbon diagram, what kind of metal is found when the carbon content is…

A: we observed from the iron-carbon equilibrium diagram below

Q: Vanadium can be used as alloying element in the manufacturing of high speed steel

A: Vanadium is an element that is used to increase the hot hardiness, fracture toughness and improve…

Q: In the carburization treatment of steels, what are the diffusing species?

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Q: Explain two important differences between martensitic and pearlitic transformations.

A: Martensitic and pearlitic are two types of steel formed by different processes. Steel has mechanical…

Q: What is the annealing process to obtain a ferritic-spherical carbide (cementite) internal structure…

A: Spheroidizing or spheroidizing anealing is the annealing process to obtain a ferritic-spherical…

Q: Question-5 (a) Describe the structural changes that take place when a 0.4%-C plain-carbon steel is…

A:

Terminology in Metal Alloys

Metal is the pure chemical element you would find on the periodic table. 91 of the 118 elements on the periodic table are metals – which make them some of the most plentiful elements in the world.