Essentials Of Materials Science And Engineering
Essentials Of Materials Science And Engineering
4th Edition
ISBN: 9781337670845
Author: ASKELAND
Publisher: Cengage
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Chapter 13, Problem 13.40P
Interpretation Introduction

Interpretation:

The hardness and microstructure for 1050 steel of 2 inch diameter and same quenching medium as 4320 steel needs to be determined.

Concept Introduction:

Quenching is the heat treatment process in which material undergoes rapid cooling by using cooling media such as water, oil or air in order to obtain material properties. The material properties are hardness, ductility, strength, wear resistance, toughness, fracture, etc. Quenching is especially used to hardened steel by introducing martensite in the material.

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Chemical Engineering Use the psychrometric chart and demonstrate the linear interpolation method to obtain -0.52 KJ/KgDA.  This is the enthalpy deviation.   The exercise is uploaded below.
Chemical Engineering  Use the psychrometric chart. The remaining curves on the psychrometric chart are almost vertical and convex to the left, with labeled values (on Figure 8.4-1) of 0.05, 0.1, 0.2, and so on. (The units of these numbers arekJ/kg DA). Thesecurves are usedto determine theenthalpyof humid air that is not saturated. The procedure is as follows: (a) locate the point on the chart corresponding to air at its specified condition; (b) interpolate to estimate the enthalpy deviation at this point; (c) follow the constant wet-bulb temperature line to the enthalpy scale above the saturation curve, read the value on that scale, and add the enthalpy deviation to it. Also, you will see the exercise on the piece of paper.
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