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Title:
Spremljanje faznih transformacij v jeklih z in-situ meritvami električne upornosti
Authors:
ID
Jevšnik, Marcel
(Author)
ID
Brunčko, Mihael
(Mentor)
More about this mentor...
ID
Anžel, Ivan
(Comentor)
Files:
MAG_Jevsnik_Marcel_2016.pdf
(4,68 MB)
MD5: 818B2EF60A71AD564FC6CCFD5B89E789
Language:
Slovenian
Work type:
Master's thesis/paper
Typology:
2.09 - Master's Thesis
Organization:
FS - Faculty of Mechanical Engineering
Abstract:
V magistrski nalogi je obravnavana uporabnost neporušne merilne metode sprotnega merjenja električne upornosti med toplotnimi cikli za zasledovanje in karakterizacijo faznih sprememb. Rezultati "In-situ" meritev sprememb električne upornosti so bili primerjani z metealografskimi analizami vzorcev jekel, odvzetimi pred in po meritvah na napravi za sprotno spremljanje procesov. Za večji nabor literature in rezultatov že opravljenih raziskav, je bila metoda najprej preizkušena na komercialnih jeklih. Kasnejši preizkusi so bili opravljeni tudi na novih jeklih, razvitih na Inštitutu za tehnologijo materialov fakultete za strojništvo. Ugotovljeno je bilo, da obstaja dobra korelacija med rezultati "In-situ" meritev električne upornosti in rezultati metalografskih analiz. Na podlagi dobljenih rezultatov lahko sklepamo, da je metoda primerna za sprotno spremljanje mikrostrukturnih sprememb med toplotno obdelavo. Metoda ima tudi svoje prednosti, saj zajema rezultate meritev skozi celotno temperaturno obdelavo ter posledično omogoča boljši vpogled v procese, kjer je te procese težje nadzorovati z uporabo klasičnih metod.
Keywords:
Fazne transformacije
,
električna upornost
,
nanostrukturno bainitno jeklo
Place of publishing:
Maribor
Publisher:
[M. Jevšnik]
Year of publishing:
2016
PID:
20.500.12556/DKUM-59158
UDC:
620.18:669.15-194.591(043.2)
COBISS.SI-ID:
19765526
NUK URN:
URN:SI:UM:DK:77MKRRO6
Publication date in DKUM:
13.06.2016
Views:
1325
Downloads:
148
Metadata:
Categories:
KTFMB - FS
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:
JEVŠNIK, Marcel, 2016,
Spremljanje faznih transformacij v jeklih z in-situ meritvami električne upornosti
[online]. Master’s thesis. Maribor : M. Jevšnik. [Accessed 26 March 2025]. Retrieved from: https://dk.um.si/IzpisGradiva.php?lang=eng&id=59158
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Secondary language
Language:
English
Title:
Monitoring of phase transformation in steels with in-situ electric resistance measurements
Abstract:
In the master thesis the application of nondestructive method, based on continuous electrical resistivity measurement has been applied for monitoring of phase transformations in ferrous alloys. The results of "in-situ" measurements of changes in electrical resistivity were compared with metallographic analysis of steel samples taken before and after thermal cycling. At first the method was tested on steels which are commonly used in industry and have are fairly well known, thus simplifying the interpretation of the results. Later tests were conducted on new steels, developed at the Institute of Materials Technology at the Faculty of mechanical engineering. It has been established that there is a good correlation between the measurements of the electrical resistivity and metallographic analysis. Based on the obtained results we can conclude that the method is suitable for detecting critical temperatures and other processes during heat treatment. It also has advantages since it is applicable to wide variety of testing specimens and enables a better insight into processes, like carbon partitioning, which are difficult to monitor/detect using conventional methods.
Keywords:
Phase transformation
,
electrical resistivity
,
nanostructured bainitic steel
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