Autre Publication Scientifique Année : 2022

Three-dimensional atomic scale characterization of nano-scale B2 phase in Ni-alloyed Fe-Mn-Al-C low-density steel

Karanam Gururaj
  • Fonction : Auteur
Chinmoy Mahata
  • Fonction : Auteur
M.B. Ponnuchamy
  • Fonction : Auteur
Krushna Kumbhar
  • Fonction : Auteur
K.G. Pradeep
  • Fonction : Auteur

Résumé

The enhanced mechanical properties of Al-alloyed Fe-Mn-C based multi-component steels are primarily derived from the different phases present in them in addition to their size,distribution, morphology, volume fraction and stability. Here we report on the thermaltability of the steel in the temperature range of 600 - 1200 °C and the associated temporalevolution of nano-scale phases in a hot-rolled 5Ni-alloyed Fe-16Mn-9Al-0.9C (wt.%) lowdensitysteel. Phase analysis by X-ray diffraction indicates the presence of three phases,namely FCC structured γ, L12’ structured κ and BCC phases in as-rolled condition which is ingood agreement with the thermodynamic phase stability estimates. Combined microscopic analysis involving three-dimensional atom probe tomography reveals the presence of nanoscale κ and B2 precipitates, highly localized within the majority γ and banded BCC phase regions respectively. This presentation, therefore will focus on the phase stability, andlocalization of the B2 phase as a function of different thermal treatments. In addition, detailed tensile and compressive mechanical properties as a function of phase evolution will behighlighted.

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Dates et versions

hal-04194270 , version 1 (07-09-2023)

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  • HAL Id : hal-04194270 , version 1

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Mainak Saha, Karanam Gururaj, Chinmoy Mahata, M.B. Ponnuchamy, Krushna Kumbhar, et al.. Three-dimensional atomic scale characterization of nano-scale B2 phase in Ni-alloyed Fe-Mn-Al-C low-density steel. NMD-ATM 2022, 2022. ⟨hal-04194270⟩
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