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Quenching of Carbon Steel Plates with Water Impinging Jets: Differential Properties and Fractography
Linköping University, Department of Management and Engineering, Engineering Materials. Linköping University, Faculty of Science & Engineering. University of Gävle, Sweden.
University of Gävle, Sweden.
Väderstad Components AB, Överum, Sweden.
Linköping University, Department of Management and Engineering, Energy Systems. Linköping University, Faculty of Science & Engineering. University of Gävle, Sweden.
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2023 (English)In: Procedia Structural Integrity, ISSN 2452-3216, Vol. 43, p. 154-159Article in journal (Refereed) Published
Abstract [en]

The demand for steel components with tailored properties is constantly growing. To obtain a specific variation of microstructures and mechanical properties along the component it must undergo a controllable cooling. One way to control the cooling rates along the component is by using different simultaneous water jet impingements on a hot austenitized surface. This can be done by a newly developed test rig for water Impinging Jet Quenching Technique (IJQT). This work discusses the effect of IJQT on mechanical properties and fracture behavior of 15 mm steel plates containing 0.27 and 0.38 mass-% carbon. The samples were cooled in a specifically designed setup of the technique to obtain simultaneous water and air cooling resulting in diverse microstructures. The mechanical property gradients of both steels were analyzed through hardness measurements and tensile tests. The fracture surfaces and the near fracture regions were observed using scanning electron microscope and light optical microscope respectively. The results from tensile tests showed that the larger part of the sample with higher carbon content was fully hardened, however smoothly transitioning to a more ductile region. The sample with lower carbon content combined various degrees of hardening and transitioned from higher to lower ultimate tensile strength values. Fracture behavior of higher carbon steel was predominantly brittle transitioning to a ductile, while the lower carbon steel had a small region showing brittle fracture transitioning to a larger region of predominant ductile fracture behavior.

Place, publisher, year, edition, pages
Elsevier, 2023. Vol. 43, p. 154-159
Keywords [en]
Martensite, Brittle fracture, Ductile fracture, Impinging Jet Quenching, Boron steel
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:liu:diva-191833DOI: 10.1016/j.prostr.2022.12.251OAI: oai:DiVA.org:liu-191833DiVA, id: diva2:1737968
Available from: 2023-02-20 Created: 2023-02-20 Last updated: 2023-02-20

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Romanov, PavelMoshfegh, BahramCalmunger, Mattias

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