Evaluation of microstructural changes of S235 steel after rolling on the basis of microscopic observations and eddy current non-destructive method

• Autorzy: Kukla D. , Bałkowiec A. , Grzywna P.

Identyfikatory

DOI

10.2478/adms-2014-0020

• Języki publikacji: EN

Abstrakty

EN

The aim of the study was to determine the microstructure and residual stress changes which appears in the S235 steel (which is designed for operating in elevated temperatures) during cold rolling. The changes of orientation, both morphological and crystallographic, are occurring as a result of the rolling process. Analysis of the results allowed to determine the change in grain morphology (size, shape), determination of grain morphology of the rolling direction and determination of crystallographic texture. The dislocation density present in the material before and after the cold rolling process was estimated on the basis of dislocation structure images obtained via transmission electron microscope. The observed microstructural changes were correlated with the results of nondestructive testing using eddy current method. They allowed for the identification of the state of stress measured on three different surfaces of the rolled sheet (parallel and perpendicular to the rolling direction). As the result the usability of using the non - destructuve techniques of stress level determination was proved.

Słowa kluczowe

EN

S235 steel; microstructure; eddy current; cold rolling

PL

stal S235; mikrostruktury; prądy wirowe; walcowanie na zimno

• Wydawca: Politechnika Gdańska
• Czasopismo: Advances in Materials Science
• Rocznik: 2014
• Tom: Vol. 14, nr 4(42)
• Strony: 40--48
• Opis fizyczny: Bibliogr. 7 poz., wykr., rys., tab.

Twórcy

autor

Kukla D.

• Institut of Fundamental Technological Research Polish Academy of Science, 02-106 Warszawa, ul. Pawińskiego 5b,

autor

Bałkowiec A.

• Warsaw University of Technology, Faculty of Materials Science and Engineering, 02-507 Warsaw, Wołoska str. 141, Poland

autor

Grzywna P.

• Institut of Fundamental Technological Research Polish Academy of Science, 02-106 Warszawa, ul. Pawińskiego 5b

Bibliografia

• 1. Norfleet D.M., Dimiduk D.M., Polasik S.J., Uchic M.D., Mills M.J.: Dislocation structures and their relationship to strength in deformed nickel microcrystals, Acta Materialia, 56 (2008), 2988-3001.
• 2. Kukla D., Grzywna P., Zagórski A.: Development evaluation fatigue degradation of P91 steel based on changes in the phase angle of theeddy current signal [in Polish], Welding Technology Review, 13 (2012), 8-11.
• 3. Oka M., Tsuchida Y., Yakushiji T., Enokizono M.: Fatigue Evaluation for a Ferritic Stainless Steel (SUS430) by the Eddy Current Method Using the Pancake-Type Coil. Idee Transactions On Magnetic 46-2 (2010).
• 4. Kukla D., Kowalewski Z., Grzywna P., Kubiak K., Assessment of fatigue damage development in power engineering steel by local strain analysis, KOVOVE MATERIALY-METALLIC MATERIALS (ISSN: 0023-432X), Vol.52, 5, 269-277.
• 5. Kukla D., Grzywna P., Karczewski R., Evaluation of the development of fatigue damage based on changes in strain and eddy current parameters in subsequent cycles load [in Polish], Welding Technology Review, 5 (2014), 23-31,
• 6. Khan S.H., Farhad A., usair Khan A., Iqbal M.A., Eddy current detection of changes in stainless steel after cold reduction, Computational Materials Science, Vol. 43 (2008), 623-628.
• 7. Kashefi M., Kahrobaee S., Nateq M.H., On the Relationship of Magnetic Response to Microstructure in Cast Iron and Steel Parts, Journal of Materials Engineering and Performance, 21 (2012), 1520-15