Is it true that Martensite is tempered because it is too strong? Why or Why not
Q: 9. Typical microscopic images of spheroidite, lower bainite and tempered martensite of an…
A: (a) Spheroidite: It is a micro structure of steel composed of spherical shaped cementite particles…
Q: B) What is the difference between the Eutectic alloy and other alloy in the phase diagrams ? explain…
A: Eutectic alloy example: 4.3 % carbon cast iron 60% Sn- Pb-Sn alloy : solder
Q: Explain about upper critical temperatures, Name the steels that upper critical temperature decreases…
A: Upper critical temperature; The upper critical temperature is the point below which cementite or…
Q: How did you determine the eutectic point? Explain.
A: In phase diagram , eutectic point is the point where liquid exist at the lower temperature.this…
Q: Q2. Explain hot working process with respect to microstructure. Also draw the diagram of…
A: Hot working process with respect to microstructure is discussed below.
Q: Explain why a 92% copper – 8% nickel can or cannot be age hardened.
A: Age hardening: Age hardening is a heat treatment process that is used to increase the yield strength…
Q: Figure 11.20 For cylindrical specimens of an oil-quenched 4140 steel, (a) tensile strength, (b)…
A:
Q: which one harder pearlite producing by normalizing or by and annealing and why?
A: To change the mechanical property of the material, the heat treatment processes are employed. There…
Q: At (950 °C), (0.8 %) carbon steel is getting decarburized for a duration of (4 hr) in an atmosphere…
A: From data table DC=0.7×10-4exp [-157×1000/8.314×1223] =1.38×10-11m2s-1C2=0.8%CS=0%C(x)…
Q: Based on the phase diagrams, estimate the solubilities of Ni, Zn, Al, Sn, andBe in copper at room…
A: To estimate the solubility, the use of the atom size difference approach, we will determine the…
Q: Is it correct to say Thick pearlite is not as strong as thin pearlite?
A: Thick pearlite is also known as coarse pearlite. And thin pearlite is known as fine pearlite.
Q: The hypoeutectoid steel contains less than 0.83%C and the hypereutectoid steel contains more than…
A: In iron carbon diagram, when the carbon percentage is less than 0.83 % then hypoeutectoid steel is…
Q: Two cubical castings of the same metal and sizes of 2 cm side and 4 cm side are moulded in green…
A: Given:Side of 1st square= 2 cmSide of 2nd square= 4 cmSolidification time, T1=2 mins
Q: The copper-nickel system is a simple alloy system, as indicated by its phase diagram. Why is it so…
A: In materials with more than one component, a phase diagram depicts the spectrum of possible phases.…
Q: Plot the Iron-Iron Carbide phase diagram (Eutectoid Portion) and answer the following: a) Show the…
A: Iron - Carbide Phase Diagram
Q: 1.50% Pearlite, 50% Tempered Martensite 2.50% Bainite, 45% Martensite, 5% Austenite
A: To find: Steps to attain the following phase
Q: Draw the iron carbon phase diagram and labeling all lines and areas. Then:- 1- find the melting…
A: Since you have posted a question with multiple sub-parts, we will solve first three sub parts for…
Q: What is the% C ratio of two different steels with 80% and equal austenite content at 724 Celsius?
A: Answer is 0.3
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: What is the% C ratio of two different steels with 80% and equal austenite content at 724 C? please…
A: With the help of iron-carbon diagram,at 724oC & 80% austenite, carbon percentage will be: 0.9%…
Q: Estimate the quench rate (in °C/s) needed to avoid pearlite formation in 1.13 wt % C steel. Note…
A: Question is based on material science and can be solved as
Q: Abul Khair (AKS) steel industry produced steel sample (austenite phase) which has 1.4% C for some…
A: As From the Iron -Carbon Diagram we had concluded that ***As per our company policy we are supposed…
Q: . Briefly explain the difference between hardness and hardenability.
A: Hardness and hardenability are derived from the same root word but have a very different meaning.…
Q: 7- Precipitates are Two dimensions in nanoscale Nanoparticles true
A: 7. False precipitates are three dimensions in nanoscale. 8. Reinforcing phase Reinforcing phase…
Q: Write down what you know about curd (lamellar graphite) cast irons by classifying
A:
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: 11. What do you understand by the terms (i) static and (ii) dynamic methods for determination of…
A: In static method the alloy is held at a fixed temperature in the two phase field of solid and…
Q: Which of these microstructures arrangements is going from high to low strengths? O a) Martensite,…
A: To find : Rank the microstructures arrangements from high strength to low strength
Q: Plot the Iron-Iron Carbide phase diagram and answer the following: a) Show the heating ranges for…
A: Phase Diagram- It provides the information concerning the phase changes in many alloys system…
Q: For a 1095 steel alloy, what would the percent of each phase be at 730°C and 725°C?
A: Given alloy is steel 1095, for this steel percentage of the carbon present inside the steel is…
Q: earlite made of layers of carbide and iron or is this not pre
A: Explanation This is not precise enough because precisely pearlite made of cementiteFe3C and α-…
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: Using the Cu-Ag Phase diagram shown below, answer the following questions: Which of the following…
A: Given Cu-Ag phase diagram To find At 25% wt of silver(Ag)
Q: Explain and/or describe the following microstructures of iron/steel , how they affect the iron/steel…
A: Ferrite: The microstructure of steel is called ferrite when a very less number of interstitial voids…
Q: Bainite is an intermediate of pearlite and martensite in terms of hardness.
A: Bainite is the crystalline microstructure of steel and it forms when steel is alloy to cool faster…
Q: Q17 Which of the following statements are incorrect. (multiple Answers) O (c) For precipitation…
A:
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: What is meant by a phase? Describe an example. And what is the equilibrium phase diagram?
A: The phase of a substance is the region where the property of substance like density, index of…
Q: Compare the carbon content of steels and cast irons . Looking at an iron carbon phase diagram ,…
A: Solution:
Q: Calculate the ductility of this steel alloy in %EL.
A:
Q: Differentiate Substitutional and Interstitial solid solutions with a neat diagram
A:
Q: make a comparison between annealing, normalizing hardening, and tempering
A: The main difference between annealing and normalizing is that annealing allows the material to…
Q: 6- What is the critical cooling rate for hardening? Explain. Explain the effects of alloying…
A:
Is it true that Martensite is tempered because it is too strong? Why or Why not
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- If the carbon concentration of a plain carbon steel is 1.0%, and it is cooled fairly slowly (i.e. not quenched) from a liquid melt to room temperature, will the room temperature microstructure be 100% pearlite? If not, what phase will the “non- pearlite” grains consist of?23/. Differentiate Substitutional and Interstitial solid solutions with a neat diagram.1.50% Pearlite, 50% Tempered Martensite 2.50% Bainite, 45% Martensite, 5% Austenite
- To produce martensite, do you need to use a very slow cooling rate? Why or why not ?There are differences in the mechanical behavior of resulting material from (1) tempering martensite at 600 degrees centigrade and (2) tempering martensite 300 degrees centigrade, mention two differences and explain why the differences occur in eachMake use of drawings of segments of the Fe-Cr phase diagram to illustrate the reason for theexistence of ferritic, martensitic and austenitic stainless steels by also noting the influence ofspecific alloying elements where applicable.