20.500.12556/DKUM-91433 Mehanska karakterizacija in metalografska analiza lotnih spojev za toplotne izmenjevalce magistrsko delo Mechanical characterisation and metallographic analysis of brazed joints for heat exchanger V magistrskem delu smo ugotovili lastnosti toplotnih izmenjevalcev iz nerjavnega jekla in bakrene folije s pomočjo mehanskih preizkusov, metalografske in fraktografske analize ter meritvami mikrotrdote. Za rezultate dinamičnih testov smo izračunali koeficient in eksponent trdnosti pri utrujanju. Metalografsko analizo smo naredili na vzorcu osnovnega materiala, nepretrganega spoja in pretrganih preizkušancev mehanskih preizkusov. Na vzorcih dinamičnih preizkušancev smo izvedli tudi fraktografsko analizo. Meritve mikrotrdote HV0,1 smo opravili na nerjavnem jeklu, v okolici spoja in na utrujanih vzorcih. Z mikrostrukturnimi analizami in meritvami mikrotrdote smo ugotovili, da pride do utrjevanja materiala glede na amplitudo obremenjevanja. In the master's thesis, we investigated the properties of heat exchangers made of stainless steel and copper foil using mechanical tests, metallographic and fractographic analyses, as well as microhardness measurements. For the results of dynamic tests, we calculated the strength coefficient and strength exponent of fatigue. Metallographic analysis was conducted on samples of the base material, unbroken joints, and fractured specimens from mechanical tests. Fractographic analysis was also performed on the fractured test specimens of dynamic testing. Microhardness measurements (HV0.1) were carried out on stainless steel, in the vicinity of the joint, and on fatigued specimens. Microstructural analyses and microhardness measurements revealed that material hardening occurs depending of the load amplitude. toplotni izmenjevalec lotni spoj eksperimentalne raziskave metalografska analiza fraktografska analiza mikrotrdota heat exchangers brazed joint experimental studies metallographic analysis fractographic analysis microhardness true true false [E. Rihter] Slovenski jezik Angleški jezik Magistrsko delo/naloga 2024-12-21 20:00:48 2025-02-11 10:00:54 2025-02-22 03:10:44 0000-00-00 00:00:00 2024 0 Maribor 0 Maribor 1 spletni vir (1 datoteka PDF (XIV, 74 f.)) 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 620.18:621.791.052(043.2) 226893571 MAG_Rihter_Erik_2025.pdf MAG_Rihter_Erik_2025.pdf 1 5E148DE692C9ED0EE4159E556CACF327 23d9db685b10c0d705af18649a9d54b03c831133c0852a8e5725fc075d9bf8d4 c0d81e0f-eeea-11ef-bceb-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=188733 Fakulteta za strojništvo 0 0 0