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diff --git a/Materials_science_and_engineering_an_introduction/CH4.ipynb b/Materials_science_and_engineering_an_introduction/CH4.ipynb new file mode 100644 index 00000000..93bc9a2e --- /dev/null +++ b/Materials_science_and_engineering_an_introduction/CH4.ipynb @@ -0,0 +1,161 @@ +{
+ "metadata": {
+ "name": "CH4"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+ {
+ "cells": [
+ {
+ "cell_type": "heading",
+ "level": 1,
+ "metadata": {},
+ "source": [
+ "Chapter 4:Imperfections in solids"
+ ]
+ },
+ {
+ "cell_type": "heading",
+ "level": 3,
+ "metadata": {},
+ "source": [
+ "Example 4.1 Page No: 82"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Number of Vacancies Computation at a Specified temperature\n",
+ "\n",
+ "#Given\n",
+ "Na=6.023*10**23 #Avogadro No.\n",
+ "den=8.4*10**6 #Density of Copper\n",
+ "A=63.5 #Atomic weight of Copper\n",
+ "\n",
+ "#Calculation\n",
+ "#No. of atomic site per cubic meter\n",
+ "N=Na*den/A\n",
+ "#No. of vacancies at 1000 C\n",
+ "Qv=0.9 #Activation energy in eV\n",
+ "k=8.62*10**-5 # Boltzmann Constatnt in eV/K\n",
+ "T=1000.0+273.0 #Temperature in K\n",
+ "Nv=N*exp(-Qv/(k*T))\n",
+ "\n",
+ "#Result\n",
+ "print\"No.of vacancies are \",round(Nv,-24),\"/m**3\"\n",
+ "\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "No.of vacancies are 2.2e+25 /m**3\n"
+ ]
+ }
+ ],
+ "prompt_number": 13
+ },
+ {
+ "cell_type": "heading",
+ "level": 3,
+ "metadata": {},
+ "source": [
+ "Example 4.3 Page No: 88"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Composition Conversion- From weight percent to Atom percent\n",
+ "\n",
+ "#Given\n",
+ "#Conversion to Atom percent\n",
+ "C_Al=97.0 #Aluminium wt%\n",
+ "C_Cu=3.0 #Copper wt%\n",
+ "A_Al=26.98 #Atomic wt of Aluminium\n",
+ "A_Cu=63.55 #Atomic wt of Copper\n",
+ "\n",
+ "CAl=(C_Al*A_Cu)/(C_Al*A_Cu+C_Cu*A_Al)\n",
+ "CCu=(C_Cu*A_Al)/(C_Al*A_Cu+C_Cu*A_Al)\n",
+ "\n",
+ "print\"Atomic % of Al is \",round(CAl*100,1),\"%\"\n",
+ "print\"Atomic % of Cu is \",round(CCu*100,1),\"%\"\n",
+ "\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Atomic % of Al is 98.7 %\n",
+ "Atomic % of Cu is 1.3 %\n"
+ ]
+ }
+ ],
+ "prompt_number": 9
+ },
+ {
+ "cell_type": "heading",
+ "level": 3,
+ "metadata": {},
+ "source": [
+ "Example 4.4 Page No: 103"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Computations of ASTM Grain Size Number\n",
+ "\n",
+ "#Given\n",
+ "N=45.0 #No. of grains per square inch\n",
+ "\n",
+ "#Calculation\n",
+ "#Dterminin grain size no. N=2**(n-1)\n",
+ "n=(math.log(N)/math.log(2))+1\n",
+ "\n",
+ "#Number of Grains Per Unit Area\n",
+ "M=85.0\n",
+ "Nm=(100/M)**2*2**(n-1)\n",
+ "\n",
+ "#Result\n",
+ "print\"Grain size no. is \",round(n,1)\n",
+ "print\"No. of grains per inch square are \",round(Nm,1)\n",
+ "\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Grain size no. is 6.5\n",
+ "No. of grains per inch square are 62.3\n"
+ ]
+ }
+ ],
+ "prompt_number": 12
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [],
+ "language": "python",
+ "metadata": {},
+ "outputs": []
+ }
+ ],
+ "metadata": {}
+ }
+ ]
+}
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