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+{
+ "metadata": {
+  "name": ""
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": [
+      "Chapter 12 : Heat Treatment"
+     ]
+    },
+    {
+     "cell_type": "heading",
+     "level": 3,
+     "metadata": {},
+     "source": [
+      "Example 12.1 page no : 304"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "import math\n",
+      "\n",
+      "# Variables\n",
+      "n_bcc = 1./2;\n",
+      "n_fcc = 1./4;\n",
+      "r_fcc = 1.26;\t\t\t#in Angstorm\n",
+      "r_bcc = 1.24;\t\t\t#in Angstorm\n",
+      "\n",
+      "# Calculations\n",
+      "a_bcc = 4.*r_bcc/math.sqrt(3);\t\t\t#in Angstorm\n",
+      "a_fcc = 2.*math.sqrt(2)*r_fcc;\t\t\t#in Angstorm\n",
+      "v_fcc = a_fcc**3;\n",
+      "v_bcc = a_bcc**3;\n",
+      "v = 100*((n_fcc*v_fcc)-(n_bcc*v_bcc))/(n_fcc*v_fcc);\n",
+      "\n",
+      "# Results\n",
+      "print \"Percentage change in volume  =  %.3f\"%v\n"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Percentage change in volume  =  -3.764\n"
+       ]
+      }
+     ],
+     "prompt_number": 1
+    },
+    {
+     "cell_type": "heading",
+     "level": 3,
+     "metadata": {},
+     "source": [
+      "Example 12.3 pageno : 317"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "\n",
+      "# Variables\n",
+      "e = 51.;\t\t\t#Young modulous in GPa\n",
+      "v = 0.22;\t\t\t#poisson ratio\n",
+      "\n",
+      "# Calculations\n",
+      "g = e/(2*(1-v));\t\t\t#shear modulous in GPa\n",
+      "b = 2*10.**-10;\n",
+      "ue = (1./2)*g*10**9*b**2*10**12;\t\t\t#in J/m**3\n",
+      "\n",
+      "# Results\n",
+      "print \"Change in free energy during recrysatllization (in J/m**3)  =  %.1f J/m**3\"%ue\n"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Change in free energy during recrysatllization (in J/m**3)  =  653.8 J/m**3\n"
+       ]
+      }
+     ],
+     "prompt_number": 3
+    },
+    {
+     "cell_type": "heading",
+     "level": 3,
+     "metadata": {},
+     "source": [
+      "Example 12.5 pageno : 329"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "\n",
+      "# Variables\n",
+      "g = 41.*10**9;\t\t\t#in N/m**2\n",
+      "b = 0.64*10**-9;\t\t\t#in m\n",
+      "l = 20.*10**-6;\t\t\t#in m\n",
+      "\n",
+      "# Calculations\n",
+      "t = g*b/l;\t\t\t#in N/m**2\n",
+      "T = t*10.**-6;\t\t\t#in MPa\n",
+      "\n",
+      "# Results\n",
+      "print \"Contribution of these particles (in MPa)  =  %.3f MPa\"%T\n"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Contribution of these particles (in MPa)  =  1.312 MPa\n"
+       ]
+      }
+     ],
+     "prompt_number": 4
+    }
+   ],
+   "metadata": {}
+  }
+ ]
+}
+\ No newline at end of file