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Title:Strižna trdnost lotnih spojev toplotnih izmenjevalcev : magistrsko delo
Authors:ID Dvoršak, Žan (Author)
ID Glodež, Srečko (Mentor) More about this mentor... New window
ID Bončina, Tonica (Comentor)
Files:.pdf MAG_Dvorsak_Zan_2025.pdf (6,81 MB)
MD5: CA9EF9C08BBB31BC5569D31A6565D4A6
 
Language:Slovenian
Work type:Master's thesis/paper
Typology:2.09 - Master's Thesis
Organization:FS - Faculty of Mechanical Engineering
Abstract:V magistrski nalogi smo obravnavali strižno trdnost lotnih spojev toplotnih izmenjevalcev, ki so bili izdelani iz nerjavnega jekla in spojeni s postopkom vakuumskega lotanja. V okviru naše raziskave so bili izvedeni statični in dinamični strižni testi, katerih rezultati so nam podali materialne lastnosti spoja in S-N diagram življenjske dobe. V nadaljevanju je bila izvedena metalografska analiza na nepretrganem vzorcu in vzorcu s statično ter dinamično obremenitvijo. Pri tem smo izvedli tudi meritev mikrotrdote na osnovnem materialu in v okolici spoja. Na vzorcih, ki so bili utrujani, pa smo izvedli še fraktografsko analizo v kombinaciji z EDS analizo mikrostrukture. S pomočjo analiz smo uspeli povezati mehanske lastnosti spojev z njihovo mikrostrukturo in opredeliti vpliv difuzije, utrjevanja ter morebitnih napak v spoju z njihovo nosilnostjo in življenjsko dobo.
Keywords:toplotni izmenjevalec, lotni spoj, statični in dinamični strižni testi, metalografska analiza, fraktografska analiza, mikrotrdota
Place of publishing:Maribor
Place of performance:Maribor
Publisher:[Ž. Dvoršak]
Year of publishing:2025
Number of pages:1 spletni vir (1 datoteka PDF (XIII, 52 f.))
PID:20.500.12556/DKUM-95720 New window
UDC:620.176:621.791.3.052(043.2)
COBISS.SI-ID:258885379 New window
Publication date in DKUM:11.11.2025
Views:164
Downloads:23
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FS
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Licences

License:CC BY-ND 4.0, Creative Commons Attribution-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nd/4.0/
Description:Under the NoDerivatives Creative Commons license one can take a work released under this license and re-distribute it, but it cannot be shared with others in adapted form, and credit must be provided to the author.
Licensing start date:14.10.2025

Secondary language

Language:English
Title:Shear strength of brazed joints of heat exchangers
Abstract:In our master's thesis, we discussed the shear strength of soldered joints of heat exchangers, which were made of stainless steel and joined using a vacuum soldering process. As part of our research, static and dynamic shear tests were performed, the results of which provided us with the material properties of the joint and the S-N diagram of its service life. Subsequently, metallographic analysis was performed on an original sample and samples with static and dynamic loads. We also performed microhardness measurements on the base material and in the vicinity of the joint. A fractographic analysis in combination with EDS analysis was later performed on fatigued samples. With the help of the analyses, we managed to connect the mechanical properties of the joints with their microstructure and define the influence of diffusion, hardening and possible defects in the joint, on their load-bearing capacity and service life.
Keywords:heat exchangers, brazed joint, static and dynamic shear tests, metallographic analysis, fractographic analysis, microhardness


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