Vol.8, No1, 2008, pp. 41-54
UDC 620.1:669.14, 621.791.05:669.14

Abstract

Results of experimental investigation are presented, performed for the analysis of crack resistance under static and under variable loading of alloyed steel A-387 (SRPS Č.7400) for elevated temperature application and its welded joint. Tests on SEN-B, CT and Charpy pre-cracked specimens have evaluated the significance that microstructural heterogeneity and mechanical properties of welded joints have on the fracture toughness and fatigue crack initiation and propagation, at room and working temperatures.

Keywords: alloyed steel, welded joint, fracture toughness, fatigue crack, fatigue threshold