Microstructural and magnetic characterization of a lean duplex steel: Strain-induced martensite formation and austenite reversion (2021)
- Authors:
- USP affiliated authors: SANDIM, MARIA JOSÉ RAMOS - EEL ; SANDIM, HUGO RICARDO ZSCHOMMLER - EEL ; MOTA, CRISTIANE FÁTIMA GUIMARÃES SILVEIRA - EEL
- Unidade: EEL
- DOI: 10.1016/j.jmmm.2020.167370
- Subjects: INDUÇÃO DE METAIS; MAGNETISMO
- Agências de fomento:
- Language: Inglês
- Abstract: Strain-induced α′-martensite and austenite reversion in a cold rolled UNS S32304 lean duplex steel were tracked by means of magnetic measurements, with emphasis on both Ms (saturation magnetization) and Hc (coercive field) parameters. Grain-averaged quality metrics derived from EBSD (electron backscatter diffraction) analysis were also used to distinguish the phases during austenite reversion. The material was cold rolled to a true strain (ε) of 1.61 and subjected to isothermal and continuous annealing, the latter conducted in the presence of an external magnetic field. The evolution of the α′-martensite fraction upon straining and after isothermal annealing was monitored by coupling the Ms values and thermodynamic simulations, as well as from EBSD analysis. For the isothermally annealed material (ε = 1.61), the overall behavior of Ms and hardness displayed similar trends with a strong decrease for temperatures higher than 500 °C, suggesting austenite reversion. Results confirmed the occurrence of austenite reversion for the temperature interval investigated here. At 800 °C, austenite reversion is complete, and the steel is fully recrystallized. Besides, from the EBSD analysis, evidence of ferrite transformation into austenite was rather noticeable, in accordance with thermodynamic simulations and magnetic probing. Complementary electron channeling contrast imaging (ECCI) revealed that precipitation reactions mainly occur in the recrystallized austenite at 700 and 800 °C. The Hc behavior of both, the strained and annealed conditions was inferred to be mostly driven by microstructural changes in ferrite.
- Imprenta:
- Source:
- Título: Journal of Magnetism and Magnetic Materials
- ISSN: 0304-8853
- Volume/Número/Paginação/Ano: v. 517, 10 p
- Este periódico é de assinatura
- Este artigo NÃO é de acesso aberto
- Cor do Acesso Aberto: closed
-
ABNT
SANDIM, Maria Jose Ramos et al. Microstructural and magnetic characterization of a lean duplex steel: Strain-induced martensite formation and austenite reversion. Journal of Magnetism and Magnetic Materials, v. 517, 2021Tradução . . Disponível em: https://doi.org/10.1016/j.jmmm.2020.167370. Acesso em: 18 out. 2024. -
APA
Sandim, M. J. R., Souza Filho, I. R. de, MOTA, C. F. G. S., Sandim, H. R. Z., & Zilnyk, K. D. (2021). Microstructural and magnetic characterization of a lean duplex steel: Strain-induced martensite formation and austenite reversion. Journal of Magnetism and Magnetic Materials, 517. doi:10.1016/j.jmmm.2020.167370 -
NLM
Sandim MJR, Souza Filho IR de, MOTA CFGS, Sandim HRZ, Zilnyk KD. Microstructural and magnetic characterization of a lean duplex steel: Strain-induced martensite formation and austenite reversion [Internet]. Journal of Magnetism and Magnetic Materials. 2021 ; 517[citado 2024 out. 18 ] Available from: https://doi.org/10.1016/j.jmmm.2020.167370 -
Vancouver
Sandim MJR, Souza Filho IR de, MOTA CFGS, Sandim HRZ, Zilnyk KD. Microstructural and magnetic characterization of a lean duplex steel: Strain-induced martensite formation and austenite reversion [Internet]. Journal of Magnetism and Magnetic Materials. 2021 ; 517[citado 2024 out. 18 ] Available from: https://doi.org/10.1016/j.jmmm.2020.167370 - Austenite reversion in lean duplex steel: Microstructural, dilatometric and magnetic characterization
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Informações sobre o DOI: 10.1016/j.jmmm.2020.167370 (Fonte: oaDOI API)
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