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Title:Vpliv mikrotrdote na trdnostno neenakost jeklenega zvarnega spoja : diplomsko delo
Authors:ID Stevanović, Tamara (Author)
ID Praunseis, Zdravko (Mentor) More about this mentor... New window
Files:.pdf UN_Stevanovic_Tamara_2022.pdf (3,72 MB)
MD5: 3BA4A5F9D49CD3CF98286A2CF63D9E5C
 
Language:Slovenian
Work type:Bachelor thesis/paper
Typology:2.11 - Undergraduate Thesis
Organization:FE - Faculty of Energy Technology
Abstract:Gradnja varjenih jeklenih konstrukcij v energetskih sistemih predstavlja poseben izziv tako na področju varjenja modernih visokotrdnostnih jekel kakor tudi s stališča varnosti in celovitosti konstrukcije. Najšibkejši člen vsake varjene jeklene konstrukcije je zvarni spoj, ki velja za izrazito heterogeno mikrostrukturo z lokalno krhkimi področji, ki imajo najnižjo lomno žilavost. Lokalno krhka področja v zvarnem spoju so zaradi visoke mikrotrdote potencialni iniciatorji krhkega loma in lahko vodijo do nenadnega širjenja razpoke in s tem porušitve varjene konstrukcije. Zaradi navedenega je treba natančno izmeriti mikrotrdoto v najbolj kritičnih smereh zvarnega spoja v skladu z veljavnimi standardi. Natančna določitev porazdelitve faktorja trdnostne neenakosti v mikrostrukturi toplotno vplivanega področja in materiala zvara predstavlja osnovno raziskavo za določitev varnega obratovanja varjene konstrukcije.
Keywords:jeklo za energetiko, jekleni zvarni spoj, meja tečenja, mikrotrdota, faktor trdnostne neenakosti.
Place of publishing:Krško
Place of performance:Krško
Publisher:[T. Stevanović]
Year of publishing:2022
Number of pages:XVI, 54 f.
PID:20.500.12556/DKUM-83488 New window
UDC:669.14:621.791(043.2)
COBISS.SI-ID:137440259 New window
Publication date in DKUM:12.01.2023
Views:971
Downloads:115
Metadata:XML DC-XML DC-RDF
Categories:FE
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Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:05.12.2022

Secondary language

Language:English
Title:The influence of microhardness on strenght mismatching of steel welded joint
Abstract:Building of steel welded structures in the energy systems represent a special challenge at the field of welding of modern high strenght steels and from a safety point of view and construction integrity. The weakest link of each welding construction is welded joint, which is the most heterogeneous microstructure with the local brittle zones, with the lowest fracture toughness. Local brittle zones of welded joint are the potencial brittle fracture initiation points due to the high microhardness, which can lead to the sudden crack propagation and final demolition of welded structure. For this reason the precise measuring of microhardness in the most critical directions of welded joint is necessary in accordance with the valid standards. The precise determination of strenght mis-match factor distribution in the heat affected zone and weld metal of welded joint microstructure represents the basic research for safely operation of welded structure.
Keywords:Energetics steel, steel welded joint, yield strength, microhardness, strength mismatching factor.


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