20.500.12556/DKUM-66584 The characterization of phase transformations in rapidly solidified Al-Fe and Cu-Fe alloys through measurements of the electrical resistance and DSC Karakterizacija faznih transformacija brzo skrutnutih Al-Fe i Cu-Fe slitine pomoću mjerenja električne otpornosti i diferencijalno skenirajuće kalorimetrije For the characterization of the phase transformations in the alloys during the heat treatment the various methods of the thermal analyses are available. Thermogravimetry, differential thermal analysis (DTA) and the differential scanning calorimetry (DSC) are the most frequently used methods. The phase transformations proceed in two stages, i.e. nucleation and the growth of the new phase. Both processes are closely linked with the movement of the atoms. Rapidly solidified alloys often contain the elements with the low diffusivity. During the transition from the unstable to the stable state the energy changes are small, therefore the characterization of the changes by DTA, DSC is very difficult and could not be measured. During the heat treatment the phase transformations of the rapidly solidified alloys of Al-Fe and Cu-Fe were successfully detected by the simultaneous measurements of the electrical resistance, and were compared by the DSC method. By determination of the temperature regions of the phase transitions or temperatures, where the dynamics of the changes is maximal, the samples were heat treated and analysed by the scanning and transmission electron microscopy respectively. Za karakterizaciju faznih transformacija slitina tijekom toplinske obrade koriste se različite metode toplinske analize (DTA). Najčešće korištene metode su termogravimetrija, diferencijalno toplinska analiza i diferencijalna skenirajuća kalorimetrija (DSK). Fazne se transformacije odvijaju u dva stadija, tj. nukleacija i rast nove faze. Oba su procesa usko povezana s gibanjem atoma. Brzo skrutnute slitine često sadrže elemente niske difuznosti. Tijekom prijelaza iz nestabilnog u stabilno stanje energetske su promjene male i zato je karakterizacija promjena pomoću DTA i DSK veoma teška i ne mjerljiva. Za vrijeme toplinske obrade mikrostrukturne transformacije brzo skrutnutih Al-Fe i Cu-Fe slitina uspješno su detektirane istodobnim mjerenjem električnog otpora. Određivanjem temperaturnih područja faznih prijelaza ili temperatura, gdje su dinamičke promjene maksimalne, uzorci su toplinski obrađeni i analizirani pomoću skener i transmisijske elektronske mikroskopije. rapidly solidified Al-Fe alloy rapidly solidified Cu-Fe alloy transformations electrical resistance differential scanning calorimetry metalurgija hitro strjena zlitina Al-Fe in Cu-Fe transformacije električna upornost diferencijalna skening kalorimetrija true false true Angleški jezik Hrvaški jezik Znanstveno delo 2017-07-03 17:27:16 2017-07-03 17:28:42 2022-08-01 12:56:32 2019-07-11 15:52:17 2006 0 0 str. 281-286 št. 4 Letn. 45 2006 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1334-2576 669 524301593 639071 1334-2576 URN:SI:UM:DK:YHMSKKTL Metalurgija_2006_Bizjak_et_al._The_Characterization_of_Phase_Transformations_in_Rapidly_Solidified_Al-Fe_and_Cu-Fe_Alloys_Through_Measur.pdf Metalurgija_2006_Bizjak_et_al._The_Characterization_of_Phase_Transformations_in_Rapidly_Solidified_Al-Fe_and_Cu-Fe_Alloys_Through_Measur.pdf 1 E8D92A4E8754347FB9BDA62A400C9C2B 191dadd9bc4cdf54a17d49282658ccb23a99c1fc8abb389928bd1391a9642386 5791fee9-7c0e-11eb-bb7a-00155d0001ca 20.500.12556/dkum/c836404c-e45e-4d5d-bf5f-4792d5707494 https://dk.um.si/Dokument.php?lang=slv&id=113520 http://hrcak.srce.hr/6467 1 https://dk.um.si/Dokument.php?lang=slv&id=113519 Fakulteta za strojništvo 0 0 0