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</o:shapelayout></xml><![endif]--></head><body lang=SL link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Vabimo vas na 20. predavanje iz sklopa "Kolokviji na IJS" v letu 2014/15, ki bo <strong><span style='color:red'>v sredo, 27. maja 2015, ob 13. uri </span></strong><span style='color:red'>v Veliki predavalnici Instituta »Jožef Stefan«</span> na Jamovi cesti 39 v Ljubljani. Napovednik predavanja najdete tudi na naslovu <a href="http://www.ijs.si/ijsw/Koledar_prireditev">http://www.ijs.si/ijsw/Koledar_prireditev</a>, posnetke preteklih predavanj<span style='color:blue'> </span>pa na <a href="http://videolectures.net/kolokviji_ijs">http://videolectures.net/kolokviji_ijs</a>. <o:p></o:p></p><p class=MsoNormal style='margin-bottom:12.0pt'>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<o:p></o:p></p><p class=MsoNormal><b><span style='mso-fareast-language:ZH-CN'>prof. dr. Leon Cizelj<o:p></o:p></span></b></p><p class=MsoNormal><i><span style='mso-fareast-language:ZH-CN'>Odsek za reaktorsko tehniko, Institut Jožef Stefan, Ljubljana, Slovenija<o:p></o:p></span></i></p><p class=MsoNormal><b><span style='font-size:14.0pt'><o:p> </o:p></span></b></p><p class=MsoNormal align=center style='text-align:center;line-height:18.0pt'><b><span lang=EN-US style='font-size:14.0pt;font-family:"Cambria","serif"'>Simulacije razvoja medkristalnih razpok v nerjavnih jeklih<o:p></o:p></span></b></p><p class=MsoNormal style='text-align:justify'><span style='font-size:11.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;margin-bottom:12.0pt;text-align:justify'><span lang=EN-US>Medkristalne napetostno-korozijske razpoke so najpogostejši vzrok za zamenjavo različne opreme v jedrskih elektrarnah po vsem svetu. Prizadele so predvsem nerjavna jekla in nikljeve zlitine z avstenitno strukturo. V zadnjih letih pa se vse pogosteje srečujemo tudi z napetostno korozijo, ki jo pospešujejo poškodbe zaradi obsevanja z nevtroni. Ta proces prizadene predvsem strukture v notranjosti reaktorja. Predstavili in osvetlili bomo večnivojske računalniške simulacije nastanka in razvoja medkristalnih poškodb, ki smo jih razvili v Odseku za reaktorsko tehniko IJS. Temeljijo na eksplicitnem modeliranju naključno oblikovanih in usmerjenih kristalnih zrn. Za popis sevalnih poškodb pa je potreben tudi pogled še nivo nižje, v samo dinamiko dislokacij. Tovrstne raziskave dobivajo nov zagon s pričetkom evropskega projekta SOTERIA, ki bo v okviru Obzorja 2020 potekal do leta 2018.<o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;margin-bottom:12.0pt;text-align:justify'>Predavanje bo v slovenščini.<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;margin-bottom:12.0pt'><strong><span style='font-family:"Calibri","sans-serif";color:red'>Lepo vabljeni!</span></strong><strong><span style='font-weight:normal'><o:p></o:p></span></strong></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> 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