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{
"metadata": {
"name": ""
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter 9 : Microstructural Examination and Non-Destructive Testing"
]
},
{
"cell_type": "heading",
"level": 3,
"metadata": {},
"source": [
"Example 9.1 pageno : 228"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"import math \n",
"\n",
"# Variables\n",
"n = 2.**(12-1);\t\t\t#astm no. = 12\n",
"\t\n",
"# Calculations\n",
"#1 sq inch = 645mm**2\n",
"d = 1./math.sqrt((n/645)*10**4);\t\t\t#grain diameter in mm\n",
"\n",
"# Results\n",
"print \"grain diameter for ASTM no. 12 (in mm) = %.4f mm\"%d\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"grain diameter for ASTM no. 12 (in mm) = 0.0056 mm\n"
]
}
],
"prompt_number": 1
},
{
"cell_type": "heading",
"level": 3,
"metadata": {},
"source": [
"Example 9.2 pageno : 228"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"# Variables\n",
"n = 2**(5-1);\t\t\t#astm no. = 5 in grain/inch**2\n",
"\n",
"# Calculations\n",
"#Lineal and Areal magnifications are related as *100 Lineal = *10000 Areal\n",
"x = n/(.01*.01);\t\t\t#in grain/inch**2 at 1 x.\n",
"a = 1./x; \t\t\t#average area in inch**2\n",
"a1 = 2.54*2.54*a;\t\t\t#average area in cm.**2\n",
"l = math.sqrt(x);\t\t\t#grains/inch of length\n",
"s = (1./l)**2; \t\t\t#surface area in sq inch\n",
"s6 = 6.*s;\t\t \t#surface area of 6 surfaces of cubic grain in sq inch\n",
"b = 0.5*s6*(l**3);\t\t\t#total boundary area in sq inch\n",
"b1 = b/(2.54);\t\t\t #total boundary area in sq cm\n",
"\n",
"# Results\n",
"print \"Average area of one grain (in sq cm) = %.2e cm**2\"%a1\n",
"print \"Boundary Area per cubic centimetre of steel (in sq cm) = %.1f cm**2\"%b1\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Average area of one grain (in sq cm) = 4.03e-05 cm**2\n",
"Boundary Area per cubic centimetre of steel (in sq cm) = 472.4 cm**2\n"
]
}
],
"prompt_number": 2
}
],
"metadata": {}
}
]
}
|
