EBK MANUFACTURING PROCESSES FOR ENGINEE
6th Edition
ISBN: 9780134425115
Author: Schmid
Publisher: YUZU
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Chapter 5, Problem 5.1Q
(a)
To determine
The characteristics of an alloy.
(a)
Expert Solution
Explanation of Solution
The characteristics of an alloy are as follows.
- An alloy is a compound having two or more chemical elements, among them at least one is a metal.
- They are used to enhance the properties of pure metals.
- They could also form intermetallic compounds.
- The alloys are used to make a metal harder than before.
(b)
To determine
The characteristics of pearlite.
(b)
Expert Solution
Explanation of Solution
The characteristics of pearlite are as follows.
- It has an alternate layer of ferrite and cementite in its structure.
- It has properties between soft and ductile or hard and brittle.
- Strength of steel is formulated by the spacing of the lamellae.
- It can also be drawn into thin wires.
(c)
To determine
The characteristics of austenite.
(c)
Expert Solution
Explanation of Solution
Austenite is a form of steel used as a highly graded stainless steel. Some of the characteristics of austenite is as follows:
- It is an allotropic form of iron having an FCC crystal structure.
- This structure has a solid solubility of up to 2.11 %.
- It possesses good formability, as it becomes ductile at elevated temperature.
- Due its FCC structure it can dissolve nickel and manganese in it.
- Austenitic steel is non-magnetic at high temperatures.
(d)
To determine
The characteristics of martensite.
(d)
Expert Solution
Explanation of Solution
The characteristics of martensite are as follows.
- It is a tetragonal form of iron.
- It has the carbon present in the interstitial position thus helps to gives higher strength.
- It is formed during the process of quenching.
- The martensite form of iron is very hard and brittle in nature.
(e)
To determine
The characteristics of cementite.
(e)
Expert Solution
Explanation of Solution
The characteristics of cementite are as follows.
- It has 100% of iron carbide with carbon content of 6.67 % and is also known as carbide.
- It is very hard and brittle in nature.
- This iron carbide has an orthorhombic crystal structure.
- It can be used with different alloys like chromium and molybdenum to enhance their properties.
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motor supplies 200 kW at 6 Hz to flange A of the shaft shown in Figure. Gear B transfers 125 W of power to operating machinery in the factory, and the remaining power in the shaft is mansferred by gear D. Shafts (1) and (2) are solid aluminum (G = 28 GPa) shafts that have the same diameter and an allowable shear stress of t= 40 MPa. Shaft (3) is a solid steel (G = 80 GPa) shaft with an allowable shear stress of t = 55 MPa. Determine:
a) the minimum permissible diameter for aluminum shafts (1) and (2)
b) the minimum permissible diameter for steel shaft (3).
c) the rotation angle of gear D with respect to flange A if the shafts have the minimum permissible diameters as determined in (a) and (b).
Chapter 5 Solutions
EBK MANUFACTURING PROCESSES FOR ENGINEE
Ch. 5 - Prob. 5.1QCh. 5 - Prob. 5.2QCh. 5 - Prob. 5.3QCh. 5 - Prob. 5.4QCh. 5 - Prob. 5.5QCh. 5 - Prob. 5.6QCh. 5 - Prob. 5.7QCh. 5 - Prob. 5.8QCh. 5 - Prob. 5.9QCh. 5 - Prob. 5.10Q
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