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Tutorials/2DStrain/Strain fitting of 2D data in GSAS-II.htm
r2384 r2814 24 24 <o:DocumentProperties> 25 25 <o:Author>Von Dreele</o:Author> 26 <o:LastAuthor> Von Dreele</o:LastAuthor>27 <o:Revision>1 5</o:Revision>28 <o:TotalTime>7 33</o:TotalTime>26 <o:LastAuthor>vondreele</o:LastAuthor> 27 <o:Revision>16</o:Revision> 28 <o:TotalTime>762</o:TotalTime> 29 29 <o:Created>2014-01-13T15:39:00Z</o:Created> 30 <o:LastSaved>201 6-07-28T18:34:00Z</o:LastSaved>31 <o:Pages>1 9</o:Pages>32 <o:Words>12 29</o:Words>33 <o:Characters>70 08</o:Characters>30 <o:LastSaved>2017-04-27T17:05:00Z</o:LastSaved> 31 <o:Pages>1</o:Pages> 32 <o:Words>1234</o:Words> 33 <o:Characters>7039</o:Characters> 34 34 <o:Company>Argonne National Laboratory</o:Company> 35 35 <o:Lines>58</o:Lines> 36 36 <o:Paragraphs>16</o:Paragraphs> 37 <o:CharactersWithSpaces>82 21</o:CharactersWithSpaces>37 <o:CharactersWithSpaces>8257</o:CharactersWithSpaces> 38 38 <o:Version>16.00</o:Version> 39 39 </o:DocumentProperties> … … 48 48 <!--[if gte mso 9]><xml> 49 49 <w:WordDocument> 50 <w:View>Print</w:View>51 50 <w:SpellingState>Clean</w:SpellingState> 52 51 <w:GrammarState>Clean</w:GrammarState> … … 668 667 {font-family:"Cambria Math"; 669 668 panose-1:2 4 5 3 5 4 6 3 2 4; 670 mso-font-charset: 1;669 mso-font-charset:0; 671 670 mso-generic-font-family:roman; 672 671 mso-font-pitch:variable; 673 mso-font-signature: 0 0 0 0 00;}672 mso-font-signature:-536870145 1107305727 0 0 415 0;} 674 673 @font-face 675 674 {font-family:Calibri; … … 678 677 mso-generic-font-family:swiss; 679 678 mso-font-pitch:variable; 680 mso-font-signature:-5368 70145 1073786111 1 0 4150;}679 mso-font-signature:-536859905 -1073732485 9 0 511 0;} 681 680 @font-face 682 681 {font-family:Tahoma; … … 1290 1289 mso-ascii-theme-font:minor-latin; 1291 1290 mso-hansi-font-family:Calibri; 1292 mso-hansi-theme-font:minor-latin;} 1291 mso-hansi-theme-font:minor-latin; 1292 mso-bidi-font-family:"Times New Roman"; 1293 mso-bidi-theme-font:minor-bidi;} 1293 1294 </style> 1294 1295 <![endif]--><!--[if gte mso 9]><xml> … … 1308 1309 <p class=MsoNormal>For this demo, data were collected with a MAR2300 area 1309 1310 detector at APS 1-ID-C with a wavelength 0.12398 Å (100<span style='font-family: 1310 Symbol'>m</span>m diameter beam) from a 1.5mm square hot rolled steel test 1311 specimen;the front surface has been dusted with some CeO<sub>2</sub> to aid in1311 Symbol'>m</span>m diameter beam) from a 1.5mm square hot rolled steel test specimen; 1312 the front surface has been dusted with some CeO<sub>2</sub> to aid in 1312 1313 calibration. Three images are used here; one is with no load on the sample and 1313 1314 the other two are with the sample under tension along the y-axis (vertical). … … 1317 1318 entries are listed in <b style='mso-bidi-font-weight:normal'><span 1318 1319 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 1319 mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font: 1320 minor-latin'>bold face</span></b> below as <b style='mso-bidi-font-weight:normal'><span 1321 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 1322 mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font: 1320 mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:minor-latin'>bold face</span></b> 1321 below as <b style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 1322 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font: 1323 1323 minor-latin'>Help/About GSAS-II</span></b>, which lists first the name of the 1324 1324 menu (here <b style='mso-bidi-font-weight:normal'><span style='font-family: 1325 1325 "Calibri",sans-serif;mso-ascii-theme-font:minor-latin;mso-hansi-theme-font: 1326 minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font:minor-latin'>Help</span></b>) 1327 and second the name of the entry in the menu (here <b style='mso-bidi-font-weight: 1328 normal'><span style='font-family:"Calibri",sans-serif;mso-ascii-theme-font: 1329 minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri; 1330 mso-bidi-theme-font:minor-latin'>About GSAS-II</span></b>).</p> 1326 minor-latin;mso-bidi-theme-font:minor-latin'>Help</span></b>) and second the 1327 name of the entry in the menu (here <b style='mso-bidi-font-weight:normal'><span 1328 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 1329 mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:minor-latin'>About GSAS-II</span></b>).</p> 1331 1330 1332 1331 <h2>Step 1: Start GSAS-II and read the images</h2> … … 1338 1337 shown; its appearance will depend on your OS. Change the search directory to <b 1339 1338 style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 1340 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family: 1341 Calibri;mso-bidi-theme-font:minor-latin'>2Dstrain/data</span></b> and then 1342 select the files <b style='mso-bidi-font-weight:normal'><span style='font-family: 1343 "Calibri",sans-serif;mso-ascii-theme-font:minor-latin;mso-hansi-theme-font: 1344 minor-latin;mso-bidi-font-family:Calibri;mso-bidi-theme-font:minor-latin'>nx09_strain_001.mar<span 1345 class=GramE>2300, <span style='font-family:"Times New Roman",serif;font-weight: 1346 normal'><span style='mso-spacerun:yes'> </span></span>nx</span>09_strain_006.mar2300 1347 </span></b>and <b style='mso-bidi-font-weight:normal'><span style='font-family: 1348 "Calibri",sans-serif;mso-ascii-theme-font:minor-latin;mso-hansi-theme-font: 1349 minor-latin'>nx09_strain_011.mar2300</span></b> and press <b style='mso-bidi-font-weight: 1339 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font: 1340 minor-latin'>2Dstrain/data</span></b> and then select the files <b 1341 style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 1342 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font: 1343 minor-latin'>nx09_strain_001.mar2300<span class=GramE>, <span style='font-family: 1344 "Times New Roman",serif;font-weight:normal'><span 1345 style='mso-spacerun:yes'> </span></span>nx09</span>_strain_006.mar2300 </span></b>and 1346 <b style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 1347 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin'>nx09_strain_011.mar2300</span></b> 1348 and press <b style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 1349 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font: 1350 minor-latin'>Open</span></b>.<span style='mso-no-proof:yes'> Select the 1<sup>st</sup> 1351 image (001) from the GSAS-II data tree and select </span><b style='mso-bidi-font-weight: 1350 1352 normal'><span style='font-family:"Calibri",sans-serif;mso-ascii-theme-font: 1351 minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri; 1352 mso-bidi-theme-font:minor-latin'>Open</span></b>.<span style='mso-no-proof: 1353 yes'> Select the 1<sup>st</sup> image (001) from the GSAS-II data tree and 1354 select </span><b style='mso-bidi-font-weight:normal'><span style='font-family: 1355 "Calibri",sans-serif;mso-ascii-theme-font:minor-latin;mso-hansi-theme-font: 1356 minor-latin;mso-no-proof:yes'>Image Controls</span></b><span style='mso-no-proof: 1357 yes'>; adjust the </span><b style='mso-bidi-font-weight:normal'><span 1358 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 1359 mso-hansi-theme-font:minor-latin;mso-no-proof:yes'>Max intensity</span></b><span 1353 minor-latin;mso-hansi-theme-font:minor-latin;mso-no-proof:yes'>Image Controls</span></b><span 1354 style='mso-no-proof:yes'>; adjust the </span><b style='mso-bidi-font-weight: 1355 normal'><span style='font-family:"Calibri",sans-serif;mso-ascii-theme-font: 1356 minor-latin;mso-hansi-theme-font:minor-latin;mso-no-proof:yes'>Max intensity</span></b><span 1360 1357 style='mso-no-proof:yes'> so that the CeO2 rings are visible (~1500 will 1361 suffice ). You should see:<o:p></o:p></span></p>1358 suffice or 99%). You should see:<o:p></o:p></span></p> 1362 1359 1363 1360 <p class=MsoNormal><span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shapetype … … 1381 1378 <v:path o:extrusionok="f" gradientshapeok="t" o:connecttype="rect"/> 1382 1379 <o:lock v:ext="edit" aspectratio="t"/> 1383 </v:shapetype><v:shape id=" Picture_x0020_22" o:spid="_x0000_i1045" type="#_x0000_t75"1384 style='width:524.25pt;height:450pt;visibility:visible;mso-wrap-style:square'>1380 </v:shapetype><v:shape id="_x0000_i1045" type="#_x0000_t75" style='width:524.25pt; 1381 height:450pt;visibility:visible;mso-wrap-style:square'> 1385 1382 <v:imagedata src="Strain%20fitting%20of%202D%20data%20in%20GSAS-II_files/image001.png" 1386 1383 o:title=""/> 1387 1384 </v:shape><![endif]--><![if !vml]><img width=699 height=600 1388 1385 src="Strain%20fitting%20of%202D%20data%20in%20GSAS-II_files/image001.png" 1386 v:shapes="_x0000_i1045"><![endif]><o:p></o:p></span></p> 1387 1388 <p class=MsoNormal><span style='mso-no-proof:yes'>For the image and <o:p></o:p></span></p> 1389 1390 <p class=MsoNormal><span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape 1391 id="Picture_x0020_22" o:spid="_x0000_i1044" type="#_x0000_t75" style='width:510.75pt; 1392 height:438.75pt;visibility:visible;mso-wrap-style:square'> 1393 <v:imagedata src="Strain%20fitting%20of%202D%20data%20in%20GSAS-II_files/image022.png" 1394 o:title=""/> 1395 </v:shape><![endif]--><![if !vml]><img width=681 height=585 1396 src="Strain%20fitting%20of%202D%20data%20in%20GSAS-II_files/image022.png" 1389 1397 v:shapes="Picture_x0020_22"><![endif]><o:p></o:p></span></p> 1390 1391 <p class=MsoNormal><span style='mso-no-proof:yes'>For the image and <o:p></o:p></span></p>1392 1393 <p class=MsoNormal><span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape1394 id="Picture_x0020_2" o:spid="_x0000_i1044" type="#_x0000_t75" style='width:471.75pt;1395 height:388.5pt;visibility:visible;mso-wrap-style:square'>1396 <v:imagedata src="Strain%20fitting%20of%202D%20data%20in%20GSAS-II_files/image002.png"1397 o:title=""/>1398 </v:shape><![endif]--><![if !vml]><img width=629 height=5181399 src="Strain%20fitting%20of%202D%20data%20in%20GSAS-II_files/image002.png"1400 v:shapes="Picture_x0020_2"><![endif]><o:p></o:p></span></p>1401 1398 1402 1399 <p class=MsoNormal><span style='mso-no-proof:yes'>for the controls.<o:p></o:p></span></p> … … 1437 1434 <p class=MsoNormal>Use <b style='mso-bidi-font-weight:normal'><span 1438 1435 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 1439 mso-hansi-theme-font:minor-latin'> Operations/Calibrate</span></b>, select 51436 mso-hansi-theme-font:minor-latin'>Calibration/Calibrate</span></b>, select 5 1440 1437 points on the inner CeO<sub>2</sub> ring with left mouse button and start 1441 1438 calibration with right mouse button. The result should be something like</p> 1442 1439 1443 1440 <p class=MsoNormal><span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape 1444 id=" Picture_x0020_24" o:spid="_x0000_i1043" type="#_x0000_t75" style='width:524.25pt;1445 height:450pt;visibility:visible;mso-wrap-style:square'>1441 id="_x0000_i1043" type="#_x0000_t75" style='width:524.25pt;height:450pt; 1442 visibility:visible;mso-wrap-style:square'> 1446 1443 <v:imagedata src="Strain%20fitting%20of%202D%20data%20in%20GSAS-II_files/image003.png" 1447 1444 o:title=""/> 1448 1445 </v:shape><![endif]--><![if !vml]><img width=699 height=600 1449 1446 src="Strain%20fitting%20of%202D%20data%20in%20GSAS-II_files/image003.png" 1450 v:shapes=" Picture_x0020_24"><![endif]></span></p>1447 v:shapes="_x0000_i1043"><![endif]></span></p> 1451 1448 1452 1449 <p class=MsoNormal>Ive zoomed in to show that the CeO2 rings are well fitted … … 1455 1452 1456 1453 <p class=MsoNormal><span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape 1457 id=" Picture_x0020_25" o:spid="_x0000_i1042" type="#_x0000_t75" style='width:471.75pt;1458 height:388.5pt;visibility:visible;mso-wrap-style:square'>1459 <v:imagedata src="Strain%20fitting%20of%202D%20data%20in%20GSAS-II_files/image0 04.png"1460 o:title=""/> 1461 </v:shape><![endif]--><![if !vml]><img width=6 29 height=5181462 src="Strain%20fitting%20of%202D%20data%20in%20GSAS-II_files/image0 04.png"1463 v:shapes=" Picture_x0020_25"><![endif]></span><span1454 id="_x0000_i1042" type="#_x0000_t75" style='width:510.75pt;height:438.75pt; 1455 visibility:visible;mso-wrap-style:square'> 1456 <v:imagedata src="Strain%20fitting%20of%202D%20data%20in%20GSAS-II_files/image023.png" 1457 o:title=""/> 1458 </v:shape><![endif]--><![if !vml]><img width=681 height=585 1459 src="Strain%20fitting%20of%202D%20data%20in%20GSAS-II_files/image023.png" 1460 v:shapes="_x0000_i1042"><![endif]></span><span 1464 1461 style='mso-spacerun:yes'> </span></p> 1465 1462 … … 1467 1464 1468 1465 <p class=MsoNormal><span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape 1469 id="Picture_x0020_26" o:spid="_x0000_i1041" type="#_x0000_t75" style='width:609.75pt; 1470 height:89.25pt;visibility:visible;mso-wrap-style:square'> 1471 <v:imagedata src="Strain%20fitting%20of%202D%20data%20in%20GSAS-II_files/image005.png" 1472 o:title=""/> 1473 </v:shape><![endif]--><![if !vml]><img width=813 height=119 1474 src="Strain%20fitting%20of%202D%20data%20in%20GSAS-II_files/image005.png" 1475 v:shapes="Picture_x0020_26"><![endif]></span></p> 1476 1477 <p class=MsoNormal>You should now copy these results to the other image. Use <b 1478 style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 1479 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin'>Operations/Copy 1480 controls</span></b>; a popup dialog will appear; select <b style='mso-bidi-font-weight: 1481 normal'><span style='font-family:"Calibri",sans-serif;mso-ascii-theme-font: 1482 minor-latin;mso-hansi-theme-font:minor-latin'>All IMG</span></b> and <b 1483 style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 1484 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin'>OK</span></b>.</p> 1466 id="Picture_x0020_24" o:spid="_x0000_i1041" type="#_x0000_t75" style='width:744.75pt; 1467 height:120pt;visibility:visible;mso-wrap-style:square'> 1468 <v:imagedata src="Strain%20fitting%20of%202D%20data%20in%20GSAS-II_files/image024.png" 1469 o:title=""/> 1470 </v:shape><![endif]--><![if !vml]><img width=993 height=160 1471 src="Strain%20fitting%20of%202D%20data%20in%20GSAS-II_files/image024.png" 1472 v:shapes="Picture_x0020_24"><![endif]></span></p> 1473 1474 <p class=MsoNormal>You should now copy these results to the other image. Use <span 1475 class=SpellE><b style='mso-bidi-font-weight:normal'><span style='font-family: 1476 "Calibri",sans-serif;mso-ascii-theme-font:minor-latin;mso-hansi-theme-font: 1477 minor-latin'>Parms</span></b></span><b style='mso-bidi-font-weight:normal'><span 1478 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 1479 mso-hansi-theme-font:minor-latin'>/Copy controls</span></b>; a popup dialog 1480 will appear; select <b style='mso-bidi-font-weight:normal'><span 1481 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 1482 mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:minor-latin'>Set </span></b><span 1483 class=GramE><b style='mso-bidi-font-weight:normal'><span style='font-family: 1484 "Calibri",sans-serif;mso-ascii-theme-font:minor-latin;mso-hansi-theme-font: 1485 minor-latin'>All</span></b></span> and <b style='mso-bidi-font-weight:normal'><span 1486 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 1487 mso-hansi-theme-font:minor-latin'>OK</span></b>.</p> 1485 1488 1486 1489 <h2 style='tab-stops:2.3in'>Step 3: Fitting unstrained steel</h2> … … 1491 1494 first image (001) and the <b style='mso-bidi-font-weight:normal'><span 1492 1495 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 1493 mso-hansi-theme-font:minor-latin'>Stress/Strain</span></b> tree item. An empty 1494 plot(Strain) will appear and the initial Stress/Strain data window</p>1496 mso-hansi-theme-font:minor-latin'>Stress/Strain</span></b> tree item. An empty plot 1497 (Strain) will appear and the initial Stress/Strain data window</p> 1495 1498 1496 1499 <p class=MsoNormal><span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape … … 1516 1519 class=GramE><b style='mso-bidi-font-weight:normal'><span style='font-family: 1517 1520 "Calibri",sans-serif;mso-ascii-theme-font:minor-latin;mso-hansi-theme-font: 1518 minor-latin'>a</span></b> </span> anduse the mouse left button to select a1521 minor-latin'>a</span></b> and</span> use the mouse left button to select a 1519 1522 ring. Do as many as you like but be sure to select some CeO<sub>2</sub> rings 1520 1523 as well; it is useful to zoom in to help with the selection. You can control … … 1522 1525 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 1523 1526 mso-hansi-theme-font:minor-latin'>Image Controls</span></b>. Each time you pick 1524 a ring, GSAS-II will display (briefly) the <b style='mso-bidi-font-weight:normal'><span 1525 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 1526 mso-hansi-theme-font:minor-latin'>Strain</span></b> plot with the points it 1527 found and then show the <b style='mso-bidi-font-weight:normal'><span 1527 a ring, GSAS-II show the <b style='mso-bidi-font-weight:normal'><span 1528 1528 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 1529 1529 mso-hansi-theme-font:minor-latin'>2D Powder Image</span></b> zoomed in where 1530 you were looking before your selection. I chose 12 rings. My Strain plot showed</p> 1530 you were looking before your selection. I chose 12 rings. Do <b 1531 style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 1532 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font: 1533 minor-latin'>Operations/Fit stress/strain;</span></b> the Strain plot is 1534 updated to show</p> 1531 1535 1532 1536 <p class=MsoNormal><span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape … … 1539 1543 v:shapes="Picture_x0020_28"><![endif]></span></p> 1540 1544 1541 <p class=MsoNormal>Notice that each ring is plotted in different colors (they 1542 are somewhat mixed for the two lines ~2Å! We will fix this next.)</p>1545 <p class=MsoNormal>Notice that each ring is plotted in different colors (they may 1546 be somewhat mixed for the two lines ~2Å! We will fix this next.)</p> 1543 1547 1544 1548 <p class=MsoNormal>The 2D Powder Image shows the picks as well</p> … … 1555 1559 <p class=MsoNormal>And the rings are listed on the <b style='mso-bidi-font-weight: 1556 1560 normal'><span style='font-family:"Calibri",sans-serif;mso-ascii-theme-font: 1557 minor-latin;mso-hansi-theme-font:minor-latin'>Stress/Strain</span></b> data window; 1558 a scroll bar allows easy access to all the entries.</p> 1559 1560 <p class=MsoNormal><span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape 1561 id="Picture_x0020_30" o:spid="_x0000_i1037" type="#_x0000_t75" style='width:569.25pt; 1562 height:411.75pt;visibility:visible;mso-wrap-style:square'> 1563 <v:imagedata src="Strain%20fitting%20of%202D%20data%20in%20GSAS-II_files/image009.png" 1564 o:title=""/> 1565 </v:shape><![endif]--><![if !vml]><img width=759 height=549 1566 src="Strain%20fitting%20of%202D%20data%20in%20GSAS-II_files/image009.png" 1567 v:shapes="Picture_x0020_30"><![endif]></span></p> 1568 1569 <p class=MsoNormal>We can now fix the mixing of the two 2Å lines; change the <b 1561 minor-latin;mso-hansi-theme-font:minor-latin'>Stress/Strain</span></b> data 1562 window; a scroll bar allows easy access to all the entries.</p> 1563 1564 <p class=MsoNormal><span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape 1565 id="Picture_x0020_25" o:spid="_x0000_i1037" type="#_x0000_t75" style='width:619.5pt; 1566 height:399pt;visibility:visible;mso-wrap-style:square'> 1567 <v:imagedata src="Strain%20fitting%20of%202D%20data%20in%20GSAS-II_files/image025.png" 1568 o:title=""/> 1569 </v:shape><![endif]--><![if !vml]><img width=826 height=532 1570 src="Strain%20fitting%20of%202D%20data%20in%20GSAS-II_files/image025.png" 1571 v:shapes="Picture_x0020_25"><![endif]></span></p> 1572 1573 <p class=MsoNormal>If necessary, we can now fix the mixing of the two 2Å lines; 1574 change the <b style='mso-bidi-font-weight:normal'><span style='font-family: 1575 "Calibri",sans-serif;mso-ascii-theme-font:minor-latin;mso-hansi-theme-font: 1576 minor-latin'>Pixel search range</span></b> to <b style='mso-bidi-font-weight: 1577 normal'><span style='font-family:"Calibri",sans-serif;mso-ascii-theme-font: 1578 minor-latin;mso-hansi-theme-font:minor-latin'>5</span></b> for both. Each 1579 change will cause a refresh of the ring selections; after you are done the <b 1570 1580 style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 1571 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin'>Pixel search 1572 range</span></b> to <b style='mso-bidi-font-weight:normal'><span 1573 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 1574 mso-hansi-theme-font:minor-latin'>5</span></b> for both. Each change will cause 1575 a refresh of the ring selections; after you are done the <b style='mso-bidi-font-weight: 1576 normal'><span style='font-family:"Calibri",sans-serif;mso-ascii-theme-font: 1577 minor-latin;mso-hansi-theme-font:minor-latin'>Strain</span></b> plot should look 1578 like</p> 1581 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin'>Strain</span></b> 1582 plot should look like</p> 1579 1583 1580 1584 <p class=MsoNormal><span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape … … 1593 1597 elements (ε<sub>11</sub>, ε<sub>12</sub> & ε<sub>22</sub>) 1594 1598 that can be determined from a single 2D diffraction ring. The resulting Strain 1595 plot now shows curves calculated from the fitted tensor elements; these are 1596 verynearly straight lines as expected from an unloaded sample.<span1599 plot now shows curves calculated from the fitted tensor elements; these are very 1600 nearly straight lines as expected from an unloaded sample.<span 1597 1601 style='mso-spacerun:yes'> </span>In particular the austenite 111 line (~2.08Å) 1598 1602 is much flatter than the ferrite 200 line (~2.03Å); this reflects the sample … … 1648 1652 need to enter the applied load for each image. Unfortunately, this must be done 1649 1653 by hand here because the load value is not the image header. The loads are: 1650 001: - 2.17425, 006: 527.917 and 011: 1004.41 all in <span class=SpellE>ne utons</span>1654 001: - 2.17425, 006: 527.917 and 011: 1004.41 all in <span class=SpellE>newtons</span> 1651 1655 (N). Each needs to be divided by the cross section area (2.25mm<sup>2</sup>) of 1652 1656 the sample; GSAS-II will do this bit of math for you, and this gives the values … … 1734 1738 <p class=MsoNormal>This table is the results of the sequential fit to the three 1735 1739 images. There are columns for each parameter; if you double click on a column 1736 heading (try a steel e11 or e22 I selected <span class=GramE><b 1737 style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 1738 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin'>1;e</span></b></span><b 1739 style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 1740 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin'>22</span></b> 1740 heading (try a steel e11 or e22 I selected <b style='mso-bidi-font-weight: 1741 normal'><span style='font-family:"Calibri",sans-serif;mso-ascii-theme-font: 1742 minor-latin;mso-hansi-theme-font:minor-latin'>1<span class=GramE>;e22</span></span></b> 1741 1743 from my list). The plot shows the variation of this parameter with image 1742 1744 sequence; press <b style='mso-bidi-font-weight:normal'><span style='font-family: … … 1761 1763 normal'><span style='font-family:"Calibri",sans-serif;mso-ascii-theme-font: 1762 1764 minor-latin;mso-hansi-theme-font:minor-latin'>Global</span></b>) in the 1<sup>st</sup> 1763 pull down box (I chose <span class=GramE><b style='mso-bidi-font-weight:normal'><span 1764 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 1765 mso-hansi-theme-font:minor-latin'>1;e</span></b></span><b style='mso-bidi-font-weight: 1766 normal'><span style='font-family:"Calibri",sans-serif;mso-ascii-theme-font: 1767 minor-latin;mso-hansi-theme-font:minor-latin'>22</span></b>) and enter <b 1768 style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 1765 pull down box (I chose <b style='mso-bidi-font-weight:normal'><span 1766 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 1767 mso-hansi-theme-font:minor-latin'>1<span class=GramE>;e22</span></span></b>) 1768 and enter <b style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 1769 1769 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin'>m*<span 1770 1770 class=SpellE>x+b</span></span></b> in the equation box; the frame will change … … 1793 1793 Editor</span></b> window should look like; press <b style='mso-bidi-font-weight: 1794 1794 normal'><span style='font-family:"Calibri",sans-serif;mso-ascii-theme-font: 1795 minor-latin;mso-hansi-theme-font:minor-latin'>OK</span></b> to exit this window.</p> 1795 minor-latin;mso-hansi-theme-font:minor-latin'>OK</span></b> to exit this 1796 window.</p> 1796 1797 1797 1798 <p class=MsoNormal><span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape … … 1840 1841 1841 1842 <p class=MsoNormal><span style='mso-no-proof:yes'><!--[if gte vml 1]><v:shape 1842 id="Picture_x0020_ 41" o:spid="_x0000_i1025" type="#_x0000_t75" style='width:524.25pt;1843 id="Picture_x0020_26" o:spid="_x0000_i1025" type="#_x0000_t75" style='width:525pt; 1843 1844 height:450pt;visibility:visible;mso-wrap-style:square'> 1844 <v:imagedata src="Strain%20fitting%20of%202D%20data%20in%20GSAS-II_files/image021.png" 1845 o:title=""/> 1846 </v:shape><![endif]--><![if !vml]><img width=699 height=600 1847 src="Strain%20fitting%20of%202D%20data%20in%20GSAS-II_files/image021.png" 1848 v:shapes="Picture_x0020_41"><![endif]></span></p> 1849 1850 <p class=MsoNormal>When you look at the other lines, you should notice that the 1851 ones at ca. 3.13Å, 1.91Å, and 1.63Å remain straight lines; these are from CeO<sub>2</sub> 1852 and should be unchanged under load.</p> 1845 <v:imagedata src="Strain%20fitting%20of%202D%20data%20in%20GSAS-II_files/image026.png" 1846 o:title=""/> 1847 </v:shape><![endif]--><![if !vml]><img width=700 height=600 1848 src="Strain%20fitting%20of%202D%20data%20in%20GSAS-II_files/image026.png" 1849 v:shapes="Picture_x0020_26"><![endif]></span></p> 1850 1851 <p class=MsoNormal>The dashed line gives the d-zero position. When you look at 1852 the other lines, you should notice that the ones at ca. 3.13Å, 1.91Å, and 1.63Å 1853 remain straight lines; these are from CeO<sub>2</sub> and should be unchanged 1854 under load.</p> 1853 1855 1854 1856 <p class=MsoNormal><o:p> </o:p></p> … … 1856 1858 <p class=MsoNormal>Again you could save the project with <b style='mso-bidi-font-weight: 1857 1859 normal'><span style='font-family:"Calibri",sans-serif;mso-ascii-theme-font: 1858 minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:Calibri; 1859 mso-bidi-theme-font:minor-latin'>File/Save project</span></b> on the main <b 1860 style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 1861 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-font-family: 1862 Calibri;mso-bidi-theme-font:minor-latin'>GSAS-II data tree</span></b> menu 1863 although it is not needed for any further tutorials. The strain results from 1864 each image can be exported as a comma delimited set of values which can easily 1865 be read by Microsoft Excel and other spread sheet programs; see <b 1866 style='mso-bidi-font-weight:normal'><span style='font-family:"Calibri",sans-serif; 1867 mso-ascii-theme-font:minor-latin;mso-hansi-theme-font:minor-latin'>Export/Image 1868 data as/Strain CSV file</span></b>.</p> 1860 minor-latin;mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:minor-latin'>File/Save 1861 project</span></b> on the main <b style='mso-bidi-font-weight:normal'><span 1862 style='font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin; 1863 mso-hansi-theme-font:minor-latin;mso-bidi-theme-font:minor-latin'>GSAS-II data 1864 tree</span></b> menu although it is not needed for any further tutorials. The 1865 strain results from each image can be exported as a comma delimited set of 1866 values which can easily be read by Microsoft Excel and other spread sheet 1867 programs; see <b style='mso-bidi-font-weight:normal'><span style='font-family: 1868 "Calibri",sans-serif;mso-ascii-theme-font:minor-latin;mso-hansi-theme-font: 1869 minor-latin'>Export/Image data as/Strain CSV file</span></b>.</p> 1869 1870 1870 1871 </div>
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