20.500.12556/DKUM-27968 Lomna žilavost "over-matched" zvarnega spoja, izmerjena na velikih in majhnih preizkušancih Fracture toughness of over-matched weld joint measured on large and small scale specimens Pri tem delu smo eksperimentalno analizirali posledice trdnostne neenakosti "over-matched" zvarnega spoja in položaja konice na vedenje pri lomu. Zvarni spoj je bil izdelan z varjenjen pod praškom (EPP). Primerjali smo lomno žilavost CTOD, določeno pri standardnih upogibnih (SENB) in velikih (WP) preizkušancih ter ocenili vpliv "constraint"-a pri nizkih temperaturah. Pri obeh tipih preizkušancev je bila razpoka narejena z utrujanjem materiala. Konica razpoke je bila v varu in grobozrnatem toplotno vplivanem področju (GZTVP). Lomno žilavost CTOD smo določali na podlagi predpisov, ki jih podaja BS 7448. oz. smernic raziskovalnega centra GKSS. The effects of weld joint strength mismatiching and the crack tip position on the fracture behaviour of overmatched welded joints produced by submerged arc welding (SAW) have been experimentally analyzed. The comparison of CTOD fracture toughness values, determined on standard three-point bend speciments (SENB) and large scale tensile (WP) specimens, and the evaluation of the influence of constraint at loww temperatures has been made. In both types of specimen the crack was made by fatigue. The crack tip was located in the weld metal and the coarse grained heat affected zone. Fracture toughness values were calculated according to BS 7448 using the direct measuring method, developed at the GKSS Research Centre in Geesthacht. varjenje zvarni spoji lomna žilavost CTOD konstrukcijsko jeklo trdnostna neenakost lokalna krhka področja upogibni SENB preizkušanec velik natezni WP preizkušanec var grobozrnato toplotno vplivano področje utrujenostna razpoka welding welded joints fracture toughness CTOD constructional steel strength mismatching local brittle zones three-point bend specimens large-scale tensile speciments weld metal coarse grained heat affected zone fatigue crack true false true Slovenski jezik Angleški jezik Znanstveno delo 2012-06-01 13:20:47 2012-06-01 13:20:48 2022-04-15 13:46:13 2021-04-11 03:28:44 2001 0 0 str. 65-68 št. 1/2 Letn. 35 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1580-2949 621.791.052:539.55:669.14.018.298 106193664 6214166 1580-2949 URN:SI:UM:DK:5P1KITED Materiali_in_tehnologije_2001_Rojko,_Vuherer,_Gliha_Lomna_zilavost_over-matched_zvarnega_spoja,_izmerjena_na_velikih_in_majhnih_preizkus.pdf Materiali_in_tehnologije_2001_Rojko,_Vuherer,_Gliha_Lomna_zilavost_over-matched_zvarnega_spoja,_izmerjena_na_velikih_in_majhnih_preizkus.pdf 1 2223C55B279B1514273BF4CBED7EE5A6 6d4754970a862fce5943397d3e80e2ecf034cf2865f0b62bd9096879ddcbe211 fe8303e8-7c0d-11eb-bb7a-00155d0001ca 20.500.12556/dkum/9c3e48e5-8eb9-4a47-b52e-5875ee2124f5 https://dk.um.si/Dokument.php?lang=slv&id=109895 http://mit.imt.si/Revija/izvodi/mit0112/rojko.pdf 1 https://dk.um.si/Dokument.php?lang=slv&id=109894 Fakulteta za strojništvo 0 0 0