Vol.8, No3, 2008, pp. 181-190
 UDC 620.178.7

TOUGHNESS AND DUCTILITY OF HIGH STRENGTH STEELS WELDED JOINTS

Vencislav Grabulov 1

Ivo Blačić, Aleksandar Radović 2

Stojan Sedmak 3

1 Institute for Materials Testing, Belgrade

2 Military Technical Institute, Belgrade

3 Faculty of Technology and Metallurgy, University of Belgrade

Abstract

Three testing methods of different loading rates had been applied using notched specimens (impact pendulum, drop weight, explosion bulging) for toughness and ductility assessment of metal manual arc welded joints. Basic properties of welded joints and transition temperatures were assessed too, as a part of weldability testing.

Results are presented of the three given methods applied to steels NIONIKRAL 70 and SUMITEN 80P, of the same strength class. It is found that the applied test methods do not exclude each other, producing complementary results for fracture behaviour of welded joints.

Keywords: high strength steel, welded joint, impact toughness, drop weight test, nil-ductility transition temperature, explosion bulge test

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