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Micro-Alloying Effect on the Inter-Critical Grain Coarsened Heat Affected Zone of a S355 Steel Welded Joint
- Source :
- Diffusion and Defect Data Part B: Solid State Phenomena; December 2023, Vol. 353 Issue: 1 p129-134, 6p
- Publication Year :
- 2023
-
Abstract
- The inter-critical heat affected zone (ICHAZ) appears to be one of the most brittle sections in the welding of high-strength micro-alloyed steels (HSLA). Following repeated heating cycles in in with temperature ranging Ac<subscript>1</subscript> /Ac<subscript>3</subscript>, the ICHAZ will face with an evident toughness and fatigue behavior reduction especially due to martensite-austenite constituent (MA) formation. Microalloying in high strength steels causes the generation of some phases in the matrix able to increase the mechanical properties of the joint. In this paper we report an investigation related to 1000 ppm vanadium addition in the welded joint of a structural S355 steel. The inter-critical zone of ta double pass welded joint is here reproduced by dilatometer, with second peak temperature ranging 720°C-790°C. The residual austenite dependence on inter-critical temperature is analyzed and related to the hardness behavior.
Details
- Language :
- English
- ISSN :
- 10120394
- Volume :
- 353
- Issue :
- 1
- Database :
- Supplemental Index
- Journal :
- Diffusion and Defect Data Part B: Solid State Phenomena
- Publication Type :
- Periodical
- Accession number :
- ejs65599041
- Full Text :
- https://doi.org/10.4028/p-7vaGJD