THE BRITTLE TENSILE FRACTURE AND （脆性拉伸断裂）.pdf

UDK 669.14.018.298:539.42 ISSN 1580-2949 Original scientific article/Izvirni znanstveni ~lanek MTAEC9, 43(1)31(2009) G. KOSEC ET AL.: THE BRITTLE TENSILE FRACTURE AND CLEAVAGE STRENGTH ... THE 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 1 2 2 2 Gorazd Kosec , Boris Arzen{ek , Jelena Vojvodi~ Tuma , Franc Vodopivec 1SIJ, d. d., Acroni, d. o. o., Kidri~eva 44, 4270 Jesenice, Slovenia 2Institute of Metals and Technology, Lepi pot 11, 1000 Ljubljana, Slovenia gorazd.kosecacroni.si Prejem rokopisa – received: 2008-11-13; sprejem za objavo – accepted for publication: 2008-12-23 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 weld’s 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