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Analiza vpliva mikro napak na trdnost pri utrujanju grobozrnatega TVP na zvarih : doktorska disertacijaVuherer, TomažNosilnost ciklično obremenjenih zvarnih spojev je odvisna od trdnosti najšibkejših mest. V primeru soležnih zvarov je najproblematičnejša mikrostruktura grobozrnatega toplotno vplivanega področja ... (TVP) na vznožju vara. Tu se pojavijo varilne zaostale napetosti in koncentracija napetosti. Mikro napake imajo vpliv na odpornost zvarov proti utrujenosti. V tej raziskavi smo pripravili vzorce jekla, ki se lahko nahajajo na vznožju vara, z mikro napakami v različnih stanjih z uporabo simulacije temperaturnega cikla varjenja in s toplotno obdelavo v peči. Umetne mikro napake so bili odtisi Vickersove piramide in slepe izvrtine. Preizkušance smo rotacijsko upogibno obremenjevali z razmerjem napetosti R = -1. Primerjali smo trdnost pri utrujanju treh martenzitnih jekel z in brez mikro napak. Upoštevali smo lokalne in globalne zaostale napetosti. Eksperimentalno smo raziskovali hitrost širjenja majhnih in velikih razpok. Analizirali smo mehanizme nastanka in zgodnjega širjenja razpok na jeklih v različnih stanjih. Nastanek razpok iz umetnih mikro napak, katerih velikost je primerljiva z največjimi mikrostrukturnimi enotami jekla, je funkcija lokalnih zaostalih napetosti zaradi priprave napak.Type of material - dissertation ; adult, seriousPublication and manufacture - Maribor : [T. Vuherer], 2008Language - slovenianCOBISS.SI-ID - 240161536
Author
Vuherer, Tomaž
Other authors
Gliha, Vladimir |
Kosec, Ladislav
Topics
Zvarni spoji |
Trdnost |
Disertacije |
utrujanje |
trdnost |
toplotno vplivano področje |
TVP |
grobokristalna zrna |
mikronapake |
zaostale napetosti |
faktor intenzivnosti napetosti |
majhne razpoke
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Library/institution |
City | Acronym | For loan | Other holdings |
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Library of Technical Faculties, Maribor | Maribor | KTFMB |
reading room 1 cop.
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National and University Library, Ljubljana | Ljubljana | NUK |
reading room 1 cop.
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University of Maribor Library | Maribor | UKM |
reading room 1 cop.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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DRS, in which the journal is indexed
Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Vuherer, Tomaž | 15682 |
Gliha, Vladimir | 05168 |
Kosec, Ladislav | 00050 |
Source: Personal bibliographies
and: SICRIS
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