Technical gazette, Vol. 32 No. 4, 2025.
Preliminary communication
https://doi.org/10.17559/TV-20241027002097
Structural Integrity of Pressure Vessel Heads Made by Incremental Sheet Forming from High-Quality Steel P460 NL1
Nedeljko Vukojević
orcid.org/0009-0000-3520-1054
; University of Zenica, Faculty of Mechanical Engineering, Fakultetska 1, 72000 Zenica
*
Zlatan Ištvanić
; Metacomm Jajce d.o.o., Bage 5, 70101 Jajce, Bosnia and Herzegovina
Fuad Hadžikadunić
orcid.org/0000-0002-1103-7285
; University of Zenica, Faculty of Mechanical Engineering, Fakultetska 1, 72000 Zenica
Nenad Gubeljak
; University of Maribor, Fakulteta za strojništvo Maribor, Smetanova ul. 17, 2000 Maribor
Amna Bajtarević-Jeleč
; University of Zenica, Faculty of Mechanical Engineering, Fakultetska 1, 72000 Zenica
* Corresponding author.
Abstract
The fabrication of pressure vessel heads with large diameters necessitates the production from a starting sheet composed of two sections with weld joint. Subsequent plastic deformation may influence changes in the mechanical properties of the sheet, particularly the welded joint. The subject of this research is the effect of incremental plastic deformation (known as Incremental sheet forming) and post weld heat treatment on the mechanical properties of the heat-affected zone in the welded joint, as well as an assessment of the structural integrity. One of the goals of the work is to show that in certain circumstances heat treatment is not necessary. The researches focus on destructive and semi destructive testing of samples extracted from an actual pressure vessel head structure. The material of the vessel head is steel grade P460 NL1, and the heads are manufactured in two thicknesses: 6 mm and 14 mm. The results of the structural integrity assessment are presented in the form of a FAD diagram.
Keywords
incremental sheet forming; post weld heat treatment; residual stress; steel grade P460 NL1; structural integrity; welded vessel heads
Hrčak ID:
332986
URI
Publication date:
29.6.2025.
Visits: 254 *