Original scientific paper

https://doi.org/10.17559/TV-20250109002250

An Analysis of Transition Temperature for Real and Simulated Heat Affected Zone of HSLA Steel

Srđan Bulatović orcid.org/0000-0001-7864-6766 ; Institute for Materials Testing (IMS), 11000 Belgrade, Bulevar vojvode Mišića 43, Serbia *
Vujadin Aleksić ; Institute for Materials Testing (IMS), 11000 Belgrade, Bulevar vojvode Mišića 43, Serbia
Bojana Zečević ; Innovation Centre of Faculty of Technology and Metallurgy, 11000 Belgrade, Karnegijeva 4, Serbia
Ivan Samardžić ; Mechanical Engineering Faculty, University of Slavonski Brod, 35000 Slavonski Brod, Trg I.B. Mažuranić 2, Croatia

* Corresponding author.

Abstract

The aim of this paper is to present the analysis of the influence of different test temperatures on the impact toughness of the real heat affected zone (RHAZ) and the simulated heat affected zone of the welded joint (SHAZ) of high strength low-alloy steel. Through thermal cycle simulation, which includes heating to a certain temperature and programmed cooling, the microstructure of different areas of the heat-affected zone was obtained on the samples, which allows us to directly draw appropriate conclusions regarding the real heat-affected zone of the welded joint. Based on the previous text, a comparison of the brittleness transition temperature values for RHAZ and SHAZ as a very important factor for structural steels was made. It has been observed that with a decrease in temperature many metals exhibit a sudden decrease in toughness, so the temperature at which the material transits from ductile to brittle fracture is called brittle transition temperature (ductile-brittle transition temperature). This indicator is very important regarding further design and exploitation of welded steel structures.

Keywords

HSLA; impact toughness; Nionikral 70; simulated heat affected zone (SHAZ); transition temperature

Hrčak ID:

328568

URI

https://hrcak.srce.hr/328568

Publication date:

27.2.2025.

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