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An Approach to Implementation of Autoencoders in Intelligent Vehicles Read chapter Read first chapter

2023 | OriginalPaper | Chapter

Examination of Absorbed Specific Fracture Energy and Notch Opening Displacement on S960QL Steel and Its Welded Joints

Authors : Illés Sas, János Lukács

Published in: Vehicle and Automotive Engineering 4

Publisher: Springer International Publishing

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Abstract

Nowadays, the safety and the economic perspective are given special attention in the production of welded structures made of high-strength steels (HSSs). One of the problems in welding of HSSs is the cold crack sensitivity, which is closely related to the residual welding stresses. These can be controlled by the use of preheating, the correct choice of welding sequence and the post-weld heat treatment (PWHT). Another problem in welding of HSSs is providing adequate toughness and hardness in the heat-affected zone. These can be controlled by heat input, more specifically by limiting the heat input. For these steels, the risk of reduced toughness from a manufacturing point of view is higher than the risk of cold cracking.
Classical techniques of fracture toughness evaluation, such as determination of the plain-strain fracture toughness or the critical value of the crack-tip opening displacement, are complex methods. The necessity of fracture mechanical test is inevitable, applying notched and precracked specimens. The determination of the absorbed specific fracture energy (Wc) and/or the notch opening displacement (NOD) is basically simpler. Notched cylindrical tensile specimens can be applied, characterised by different notch radii.
S960QL high strength steel and its welded joints without preheating and with 150 °C preheating temperature were examined; NOD and Wc values were determined and compared. Conclusions belong to the effect of the preheating and the sensitivity of the HSS, as well as the reliability of the applied material characteristics were drawn.

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previous chapter Influence of Filler Metals on Microstructure and Mechanical Properties of Gas Metal Arc Welded High Strength Steel
next chapter Comparison of Fatigue Life of K Joints with and Without Overlap Using 3D Fatigue FEM Analysis
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Metadata
Title
Examination of Absorbed Specific Fracture Energy and Notch Opening Displacement on S960QL Steel and Its Welded Joints
Authors
Illés Sas
János Lukács
Copyright Year
2023
Book
Vehicle and Automotive Engineering 4

Print ISBN: 978-3-031-15210-8

Electronic ISBN: 978-3-031-15211-5

Copyright Year: 2023

DOI
https://doi.org/10.1007/978-3-031-15211-5_84

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