A 44-diameter cylindrical steel speciemen is to be heat treated such thath the microstructure througout will be at least 50%martensite. We are to decide of several alloys will satisfy this criterion if the quenching medium i moderatly agitated.

Q: Q3: With a moderately agitated water, a cylindrical piece of steel with 80 mm diameter is to be…

A: Given data: -  The diameter of the cylindrical piece is D = 80 mm. The hardness of the surface and…

Q: Aluminium with a mass of 100 kg and an initial temperature of 20, 6\deg C is to be melted in an…

A: The mass of the aluminum, The initial temperature of aluminum, The melting point of aluminum, The…

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: An AL disk with a diameter = 10 cm and thickness = 5 cm is cast of pure aluminum in a sand casting…

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Q: Explain the normalizing process in the heat treatment of metals. b) What are the final properties…

A: Normalization process: It is a process of heating a material up to elevated temperature and then it…

Q: Choose a common metal that is solid at 0°C and liquid at 1500°C. a) Look up the following values:…

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Q: profiles for cylindrical samples of 75 mm diameter 8640 steel quenched in both moderately agitated…

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Q: 1. Using the isothermal transformation diagram below, describe the microstructure present in a…

A: Cool to 450°C, hold for 10 s, cool to 375°C, hold for 100 s, quench to 25°C:Cooling to 450°C:…

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: Brittle Dune Buggy Parts A mechanic who was building a lightweight dune buggy needed some…

A: Here, the heat-treated aluminum is quenched and allowed to age naturally. This means that the…

Q: Question 4 a) Explain the heat treatment process. b) With the aid of a temperature time…

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Q: Austenite (sloble) Coarse pearlite R/C 15 Medium pearlite R/C 30 Fine pearlite R/C 40 Upper boinite…

A: The given curve is TTT diagram which shows the relationship between temperature, time and…

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: b) A 1-cm-thick copper plate is cold-reduced to 0.50 cm and later further reduced to 0.16 cm.…

A: Given data: The initial thickness of the copper plate is, ti=1 cm. The intermediate reduced…

Atomic diffusion in solids

In material science, diffusion can take place in solid, liquid, and gases. In solids, atomic diffusion can take place with the help of thermally activated and randomly vibrating atoms. The atomic diffusion in solids is complex and very slow in comparison to atomic diffusion in liquids and gases because the interatomic distance between the atoms is smaller in solids as compared to liquids and gases.