Vol.14, No1, 2014, pp.45–49
UDC  620.1:669.14 621.791.05:669.14

INFLUENCE OF MECHANICAL PROPERTIES AND MICROSTRUCTURAL HETEROGENEITY OF WELDED JOINT CONSTITUENTS ON TENSILE PROPERTIES AND FRACTURE TOUGHNESS AT PLANE STRAIN, KIC

Ivica Čamagić1, Zijah Burzić2, Aleksandar Sedmak3, Nemanja Vasić1, Bogdan Ćirković1, Mahdi Mohamed Ahmad Algool4

1)University of Priština, Faculty of Tech. Sciences, Kosovska Mitrovica, Serbia, ivica.camagic@pr.ac.rs

2)Military Technical Institute, Belgrade, Serbia

3)University of Belgrade, Faculty of Mech. Engineering

4)Sirte University (SU), Sirte, Libyan Arab Jamahiriya

Abstract

Presented in this paper is the analysis of resistance rate to brittle fracture of welded joint constituents of the HSLA Nionikral-70 steel by applying classic and new testing methods. Tensile curves, required for stress analysis and material strength properties, are constructed and fracture mechanics properties, regarding crack development resistance, are measured. Based on the testing results, analysis of the resistance to brittle fracture represents the comparison of the obtained values for the base metal, the weld metal and the heat affected zone.

Keywords: welded joint, crack, tensile properties, yield stress, plane strain fracture toughness

full article (206 kB)