Following are tabulated data that were gathered from a series of Charpy impact tests on a tempered 4140 steel alloy. Temperature (°C) Impact Energy (J) 100 89.3 75 88.6 50 87.6 25 85.4 82.9 -25 78.9 -50 73.1 -65 66.0 -75 59.3 -85 47.9 -100 34.3 -125 29.3 -150 27.1 -175 25.0 (a) Determine a ductile-to-brittle transition temperature as that temperature corresponding to the average of the maximum and minimum impact energies. (b) Determine a ductile-to-brittle transition temperature as that temperature at which the impact energy is 70 J. (a) i °C (b) i °C

Following are tabulated data that were gathered from a series of Charpy impact tests on a tempered 4140 steel alloy. Temperature (°C) Impact Energy (J) 100 89.3 75 88.6 50 87.6 25 85.4 82.9 -25 78.9 -50 73.1 -65 66.0 -75 59.3 -85 47.9 -100 34.3 -125 29.3 -150 27.1 -175 25.0 (a) Determine a ductile-to-brittle transition temperature as that temperature corresponding to the average of the maximum and minimum impact energies. (b) Determine a ductile-to-brittle transition temperature as that temperature at which the impact energy is 70 J. (a) i °C (b) i °C

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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Concept explainers

Thermal Properties of Materials

In mechanical engineering, the thermal property is represented as the physical quantity that is relevant to the application of heat. The thermal properties are evaluated by variations in any specific material due to low heat or high heat. The quantities that influence the thermal property of the materials are mass, density, temperature, and many others.

Question

Following are tabulated data that were gathered from a series of Charpy impact tests on a tempered 4140 steel alloy.
Temperature (°C)
Impact Energy (J)
100
89.3
75
88.6
50
87.6
25
85.4
82.9
-25
78.9
-50
73.1
-65
66.0
-75
59.3
-85
47.9
-100
34.3
-125
29.3
-150
27.1
-175
25.0
(a) Determine a ductile-to-brittle transition temperature as that temperature corresponding to the average of the maximum and
minimum impact energies.
(b) Determine a ductile-to-brittle transition temperature as that temperature at which the impact energy is 70 J.
(a) i
°C
(b) і
°C

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Question 5: Following is tabulated data that were gathered from a series of Charpy impact tests on a tempered 4140 steel alloy. Temperature (°C) 100 75 50 25 0 -25 -50 -65 -75 -85 -100 -125 -150 -175 Impact Energy (J) 89.3 88.6 87.6 85.4 82.9 78.9 73.1 66.0 59.3 47.9 34.3 29.3 27.1 25.0 (a) Plot the data as impact energy versus temperature. (you can use Excel or other software). (b) Determine a ductile-to-brittle transition temperature as that temperature corresponding to the average of the maximum and minimum impact energies. (c) Determine a ductile-to-brittle transition temperature as that temperature at which the impact energy is 70 J.
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