Vladimir Gliha (Author), Tomaž Vuherer (Author), Boris Ule (Author), Jelena Vojvodič-Tuma (Author)

Abstract

Na simulatorju Gleeble smo pripravili vzorce materiala z mikrostrukturo štirih različnih TVP ob črti taljenja. Iz njih smo izdelali preizkušance za merjenje udarne in lomne žilavosti. Lomno žilavost smo izmerili pri dveh vrstah majhnih preizkušancev z razpoko: pri okroglih nateznih in upogibnih SENB-preizkušancih. Pri prvih smo lahko določili ▫$K_{Ic}$▫, pri drugih pa ▫$\theta_{c}$▫. Ko primerjamo vrednosti ▫$\theta_{c}$▫ s ▫$K_{Ic}$▫, dobimo preoptimistične rezultate. Debelina SENB-preizkušancev je tudi pri zelo nizki lommni žilavosti še premajhna.

Keywords

zvarni spoj;konstrukcijsko jeklo;toplotno vplivano področje (TVP);črta taljenja;termični vpliv;lomna žilavost;

Data

Language: Slovenian
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: IMT - Institute of Metals and Technology
Publisher: Inštitut za kovinske materiale in tehnologije
UDC: 621.791.052:539.55:669.14.018.298
COBISS: 210783 Link will open in a new window
ISSN: 1580-2949
Parent publication: Materiali in tehnologije
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Other data

Secondary language: English
Secondary title: Comparison of HAZ fracture toughness measured by two types of small scale specimens
Secondary abstract: Samples of material with microstructures of four different HAZ situated at the fusion line were prepared on a Gleeble simulator. Specimens for the experimental determination of impact and fracture toughness were machined from samples. The fracture toughness was measured on two types of small pre-cracked specimens. The ▫$K_{Ic}$▫ was determined on round tensile specimens while the ▫$\theta_{c}$▫ was obtained from SENB specimens. The results obtained from the SENB specimens are too optimistic in comparison with the ▫$K_{Ic}$▫. The SENB specimens are not thick enough, even at very low fracture toughness.
Secondary keywords: weld joint;constructional steel;heat-affected zone (HAZ);fusion line;thermal influence;fracture toughness;
URN: URN:NBN:SI
Type (COBISS): Not categorized
Pages: str. 371-374
Volume: ǂLetn. ǂ34
Issue: ǂšt. ǂ6
Chronology: 2000
ID: 1749349