1. Following is tabulated data that were gathered from a series of Charpy impact tests on a tempered 4140 steel alloy. Impact Energy (J) 89.3 88.6 Temperature (°C) 100 75 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 25.0 -175 (a) Plot the data as impact energy versus temperature. (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.

1. Following is tabulated data that were gathered from a series of Charpy impact tests on a tempered 4140 steel alloy. Impact Energy (J) 89.3 88.6 Temperature (°C) 100 75 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 25.0 -175 (a) Plot the data as impact energy versus temperature. (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.

Physical Chemistry

2nd Edition

ISBN:9781133958437

Author:Ball, David W. (david Warren), BAER, Tomas

Publisher:Ball, David W. (david Warren), BAER, Tomas

Chapter22: Surfaces

Section: Chapter Questions

Problem 22.46E: Early attempts to coat metals with Teflon, poly tetrafluoroethylene, resulted in a polymer layer...

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