Library of Technical Faculties, Maribor (KTFMB)
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Določitev lomne žilavosti na velikih preizkuševalcih in primerjava lomne žilavosti na standardnih preizkuševalcih : magistrsko deloRojko, DaniloMehanske in metalurške heterogenosti zvarnih spojev povzročajo težave pri eksperimentalnem določevanju in vrednotenju lomne žilavosti ter vplivajo na dejansko nosilnost zvarnih spojev. Raziskave ... kažejo, da je potrebno poleg globalne trdnostne neenakosti upoštevati tudi lokalno trdnostno neenakost, zlasti ko se razpoka nahaja v področju linije zlitja. Standardizirani preizkušanci za lomno-mehanske preizkuse zvarnih spojev dajejo nižje vrednosti lomne žilavosti od dejanskih vrednosti, zato niso realni pokazatelj stanja v zvarjeni konstrukciji. Da bi se približali temu stanju, je potrebno izvesti široki natezni preizkus (angl. Wide Plate Testing), ki daje višje in sprejemljivejše vrednosti lomne žilavosti. V pričujočem delu so eksperimentalno analizirane posledice trdnostne neenakosti zvarnega spoja in vpliv samega položaja konice razpoke va materialih z različnimi trdnostnimi lastnsotmi na obnašanje "over-matched" zvarnega, izdelanega z varjenjem pod praškom (EPP). Izvedena je primerjava CTOD vrednosti lomne žilavosti določenih na valikih nateznih (WP) preizušancih in na standardnih upogibnih (SENB) preizkušancih. Z namenom, da se določi prisotnost in vpliv posameznih mikrostruktur na konici razpoke na lomno obnašanje zvarnega spoja ter značaj in mesto sprožitve loma, so bile opravljene tudi metalografske in fraktografske preiskave.Type of material - master's thesisPublication and manufacture - Maribor : [D. Rojko], 2000Language - slovenianCOBISS.SI-ID - 5919254
Author
Rojko, Danilo
Other authors
Rak, Inoslav |
Gliha, Vladimir
Topics
zvarni spoj |
mehanika loma |
standardni upogibni preizkus |
široki natezni preizkus |
lomna žilavost |
strjeni zvar |
trdnostna neenakost |
lokalna krhka področja
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pisarna A-003 (FERI) MD ROJKO D. DOLOČITEV pisarna A-003 (FERI) MD ROJKO D. DOLOČITEV |
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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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Rojko, Danilo | 19094 |
Rak, Inoslav | 05016 |
Gliha, Vladimir | 05168 |
Source: Personal bibliographies
and: SICRIS
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