30 KB284 KB27 KB200020242009Arzenšek, BorisKosec, GorazdVodopivec, FrancVojvodič-Tuma, Jelenaštevilka:1letnik:43str. 31-37ISSN:1580-2949COBISSID:716458URN:URN:NBN:SI:doc-JTB4SFQZenInštitut za kovinske materiale in tehnologijeMateriali in tehnologijekonstrukcijska jeklamikrostrukturanatezni preizkustrdnostThe brittle tensile fracture and cleavage strength of a structural steel with a simulated weld-affected-zone microstructure| Trdnost pri krhkem prelomu in cepilna trdnost za konstrukcijsko jeklo s simulirano mikrostrukturo toplotne cone zvara|Tensile tests were carried out on specimens of the same micro-alloyed structural steel after different thermal treatments, with the aim being to obtain the microstructure in a weldćs heat-affected zone. The mechanical properties were determined at a temperature below the brittle threshold transition Charpy temperature, the fracture surfaces were examined, the cleavage strength was deduced and the space orientation of the cleavage facets was determined. No relation was found between the results of the tensile tests and the previously determined Charpy properties after an identical thermal treatmentOpravili smo raztržne preizkuse mikrolegiranege konstrukcijskega jekla, ki je bilo toplotno obdelano za dosego nekaterih mikrostruktur v toplotni zoni zvara. Določili smo mehanske lastnosti pri temperaturi pod pragom krhkega Charpyjevega preloma, pregledali prelomne površine, izračunali cepilno trdnost in določili prostorsko orientacijo cepilnih ploskev. Našli nismo nobene povezave med rezultati te raziskave in značilnostmi Chrapyjevega preloma jekla po enaki toplotni obdelaviTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaInštitut za kovinske materiale in tehnologije