Martensite to austenite reversion in a high-Mn steel: Partitioning-dependent two-stage kinetics revealed by atom probe tomography, in-situ magnetic measurements and simulation (2019)
- Authors:
- USP affiliated authors: SANDIM, MARIA JOSÉ RAMOS - EEL ; SANDIM, HUGO RICARDO ZSCHOMMLER - EEL ; SOUZA FILHO, ISNALDI RODRIGUES DE - EEL
- Unidade: EEL
- DOI: 10.1016/j.actamat.2018.12.046
- Assunto: MATERIAIS
- Keywords: Thermo-kinetic simulations; Curie temperature; High-Mn steel; Atom probe tomography
- Agências de fomento:
- Language: Inglês
- Abstract: Austenite (γ) reversion in a cold-rolled 17.6 wt.% Mn steel was tracked by means of dilatometry and in-situ magnetic measurements during slow continuous annealing. A splitting of the γ-reversion into two stages was observed to be a result of strong elemental partitioning between γ and α′-martensite during the low temperature stage between 390 and 575 °C. Atom probe tomography (APT) results enable the characterization of the Mn-enriched reversed-γ and the Mn-depleted remaining α′-martensite. Because of its lower Mn content, the reversion of the remaining α′-martensite into austenite takes place at a higher temperature range between 600 and 685 °C. APT results agree with partitioning predictions made by thermo-kinetic simulations of the continuous annealing process. The critical composition for γ-nucleation was predicted by thermodynamic calculations (Thermo-Calc) and a good agreement was found with the APT data. Additional thermo-kinetic simulations were conducted to evaluate partitioning-governed γ-growth during isothermal annealing at 500 °C and 600 °C. Si partitioning to γ was predicted by DICTRA and confirmed by APT. Si accumulates near the moving interface during γ-growth and homogenizes over time. We used the chemical composition of the remaining α′-martensite from APT data to calculate its Curie temperature (TCurie) and found good agreement with magnetic measurements. These results indicate that elemental partitioning strongly influences not only γ-reversion but also the TCurie of this steel. The results are important to better understand the thermodynamics and kinetics of austenite reversion for a wide range of Mn containing steels and its effect on magnetic properties.
- Imprenta:
- Source:
- Título: Acta materialia
- ISSN: 1359-6454
- Volume/Número/Paginação/Ano: v.166, p.178-191, 2019
- Status:
- Artigo possui versão em acesso aberto em repositório (Green Open Access)
- Versão do Documento:
- Versão submetida (Pré-print)
- Acessar versão aberta:
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ABNT
SOUZA FILHO, Isnaldi Rodrigues de et al. Martensite to austenite reversion in a high-Mn steel: Partitioning-dependent two-stage kinetics revealed by atom probe tomography, in-situ magnetic measurements and simulation. Acta materialia, v. 166, p. 178-191, 2019Tradução . . Disponível em: https://doi.org/10.1016/j.actamat.2018.12.046. Acesso em: 02 abr. 2026. -
APA
Souza Filho, I. R. de, Silva, A. K. da, Sandim, M. J. R., Ponge, D., Gault, B., Sandim, H. R. Z., & Raabe, D. (2019). Martensite to austenite reversion in a high-Mn steel: Partitioning-dependent two-stage kinetics revealed by atom probe tomography, in-situ magnetic measurements and simulation. Acta materialia, 166, 178-191. doi:10.1016/j.actamat.2018.12.046 -
NLM
Souza Filho IR de, Silva AK da, Sandim MJR, Ponge D, Gault B, Sandim HRZ, Raabe D. Martensite to austenite reversion in a high-Mn steel: Partitioning-dependent two-stage kinetics revealed by atom probe tomography, in-situ magnetic measurements and simulation [Internet]. Acta materialia. 2019 ;166 178-191.[citado 2026 abr. 02 ] Available from: https://doi.org/10.1016/j.actamat.2018.12.046 -
Vancouver
Souza Filho IR de, Silva AK da, Sandim MJR, Ponge D, Gault B, Sandim HRZ, Raabe D. Martensite to austenite reversion in a high-Mn steel: Partitioning-dependent two-stage kinetics revealed by atom probe tomography, in-situ magnetic measurements and simulation [Internet]. Acta materialia. 2019 ;166 178-191.[citado 2026 abr. 02 ] Available from: https://doi.org/10.1016/j.actamat.2018.12.046 - Strain hardening mechanisms during cold rolling of a high-Mn steel: Interplay between submicron defects and microtexture
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