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Vol.16, No.3, 2016, pp.179–185 |
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INFLUENCE OF TEMPERATURE AND EXPLOITATION PERIOD ON THE BEHAVIOUR OF A WELDED JOINT SUBJECTED TO IMPACT LOADING Ivica Čamagić1, Srđan Jović1, Mladen Radojković2, Simon Sedmak3, Aleksandar Sedmak4, Zijah Burzić5, Cristian Delamarian6 1)University of Priština, Faculty of Tech. Sciences, Kosovska Mitrovica, Serbia, ivica.camagic@pr.ac.rs 2)High Technical School of Professional Studies, Zvečan, Serbia 3)University of Belgrade, Innovation Centre of the Faculty of Mech. Engng., Belgrade, Serbia 4)University of Belgrade, Faculty of Mech. Engng., Serbia 5)Military-Technical Institute, Belgrade, Serbia 6)TUV SUD Romania S.R.L, Bucarest, Romania |
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Abstract Presented in this paper is the analysis of the influence of temperature and exploitation period on the measure of fracture resistance of welded joint constituents in both new and exploited low-alloyed Cr-Mo steel A-387 Gr. B subjected to impact load. Exploited parent material was a part of the reactor mantle in exploitation for over 40 years and is currently in the repair stage, wherein a part of the mantle is being replaced with newly built-in material. Performed are impact tests of a notched specimen of new and exploited parent material (PM), weld metal (WM) and heat affected zone (HAZ), at both the exploited and new PM sides, in order to determine total impact energy, and its components, crack initiation- and crack propagation energy. Based on test results, analysis of tendency toward brittle fracture, i.e. toward an increase of in-service brittleness (ageing) represents the comparison of values obtained for characteristic areas of welded joints and the justification of the selected welding technology. Keywords: welded joint, notch, crack initiation energy, crack propagation energy, instrumentation |
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full article (702 KB)
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